What Is the Plural of Swine? A Guide to Irregular Nouns

whats the plural of swine

The English language is famous for its quirks, especially when it involves the names of animals and how we count them. Navigating the world of irregular nouns requires an understanding of words that do not change their form between singular and plural states, such as swine, sheep, deer, bison, and offspring. These “zero plural” nouns can be confusing for students and native speakers alike because they defy the standard rule of adding an “-s” or “-es” to the end of a word. Understanding how to use these terms correctly is essential for anyone looking to achieve a high level of English proficiency, as it demonstrates a deep grasp of historical linguistic patterns and formal usage.

Table of Contents

Definition and Linguistic Classification

The word swine refers to any of various omnivorous, even-toed ungulates of the family Suidae, which includes the domestic pig, the wild boar, and various other species. In a grammatical sense, swine is classified as an “invariant noun” or a “zero plural” noun. This means that the word retains the exact same spelling and pronunciation whether you are referring to a single animal or a group of a thousand animals.

Linguistically, swine functions as both a singular and plural count noun. Unlike mass nouns (such as water or rice), which cannot be counted individually, you can count swine. However, the morphology—the structure of the word—does not reflect the change in quantity. This is a remnant of Old English declensions where certain neuter nouns did not take an ending in the plural nominative and accusative cases.

In modern usage, swine is often considered more formal, technical, or even archaic than the word pig. It is frequently seen in agricultural contexts, legal documents, and biblical or literary texts. When used as a derogatory term for a person, it follows the same plural rule: “That man is a swine” and “Those men are swine” are both grammatically correct.

Structural Breakdown of Zero Plurals

To understand why swine doesn’t become “swines” in standard English, we must look at the structural category of zero plurals. In English, most nouns follow the additive pattern (N + s). Zero plurals follow a pattern of identity (Singular = Plural). This identity isn’t just a lack of an ending; it is a specific grammatical feature that requires the surrounding words to indicate number.

The structure of a sentence involving swine relies heavily on “agreement.” Because the noun itself doesn’t change, the verbs and determiners (like a, this, these, many) must do the heavy lifting. For example, in the phrase “This swine is large,” the determiner this and the verb is signal that we are talking about one animal. In “These swine are large,” the determiner these and the verb are signal the plural.

This structural consistency is found in several clusters of English words, primarily those related to animals that were traditionally hunted or raised in herds. The lack of a plural marker often suggests a “mass” or “collective” view of the animals, even when they are being counted as individuals.

Historical Context of the Word Swine

The word swine descends from the Old English swīn. In Old English, this word was a neuter noun. Many neuter nouns in the Germanic languages had identical singular and plural forms in certain cases. While most English nouns eventually adopted the “-s” plural from the masculine declension (which was the most common), a small group of words resisted this change.

During the Middle English period, there was a significant amount of “leveling” where endings were dropped. Words like sheep, deer, and swine maintained their zero-ending status. This was reinforced by the fact that these animals were often treated as a collective resource. Farmers didn’t just have “a pig”; they had “swine” as a category of livestock.

Over time, the word pig (originally referring specifically to young swine) became the dominant general term in common speech. Swine moved into a more specialized register. Today, if you visit a veterinary college or a large-scale farm, you will hear “swine production” or “swine flu,” maintaining the word’s status as the professional and technical standard.

Swine vs. Pig: Understanding the Difference

While swine and pig are often used interchangeably, they occupy different niches in the English language. Pig is the standard, everyday word used by children and adults alike. It follows regular pluralization rules: one pig, two pigs. It is versatile and used in many idioms like “pig out” or “pig-headed.”

Swine, conversely, is the overarching biological and agricultural term. It is used to describe the entire species or the industry. In a scientific context, one might discuss “the domestic swine (Sus scrofa domesticus).” In a legal or regulatory context, a “swine producer” is someone who raises these animals for market. The table below highlights these distinctions.

Feature Pig / Pigs Swine
Plural Form Regular (Pigs) Zero Plural (Swine)
Tone Informal / Common Formal / Technical / Literary
Usage Context Daily conversation, pets, farm talk Science, agriculture, law, insults
Historical Root Middle English (pygge) Old English (swīn)
Example The pigs are in the mud. The farmer raised healthy swine.

Categories of Irregular Animal Nouns

Swine belongs to a specific group of nouns that do not change in the plural. This group can be broken down into several sub-categories based on the type of animal. Understanding these categories helps learners recognize patterns so they don’t have to memorize every word in isolation.

Livestock and Herding Animals

Many animals that humans have domesticated or managed in large groups for centuries fall into the zero-plural category. This includes sheep and swine. The collective nature of herding these animals likely contributed to the lack of a distinct plural form, as they were often viewed as a single unit or “stock.”

Game Animals

Animals that were historically hunted for sport or food often retain their singular form in the plural. Examples include deer, elk, moose (though “mooses” is strictly incorrect, some people mistakenly use it), and grouse. In hunting terminology, it is common to say “we are hunting duck” or “we saw three deer.”

Fish and Sea Creatures

The most expansive category of zero plurals is found under the sea. The word fish itself is usually a zero plural (though “fishes” is used when referring to multiple species). Many specific types of fish follow this rule, such as salmon, trout, cod, and halibut.

Extensive Examples and Tables

To master the use of swine and its peers, it is helpful to see them used in a variety of contexts. The following tables provide a comprehensive look at how zero plurals function compared to regular plurals and other irregular forms.

The first table below demonstrates the “Zero Plural” pattern across various animals. Notice how the word remains identical regardless of the number in the left column.

Table 1: Common Zero Plural Animals
Singular Form Plural Form Example Sentence
Swine Swine The lone swine wandered away from the herd of swine.
Sheep Sheep One sheep jumped the fence, followed by ten sheep.
Deer Deer A deer stood in the road while three deer watched from the woods.
Bison Bison The majestic bison led a group of fifty bison across the plain.
Moose Moose I saw a moose yesterday, but today I saw two moose.
Elk Elk The hunter tracked one elk, then found a valley full of elk.
Reindeer Reindeer Rudolph is a reindeer, and Santa has eight other reindeer.
Offspring Offspring The cat had one offspring in May and four offspring in June.
Quail Quail A single quail flushed from the bush, followed by a covey of quail.
Grouse Grouse We spotted a grouse on the trail and later heard many grouse.
Shrimp Shrimp I ate one shrimp to taste it, then ordered a plate of shrimp.
Squid Squid The giant squid is rare, but smaller squid are common.
Cod Cod The fisherman caught a cod and then a school of cod.
Trout Trout This trout is a rainbow trout; those trout are brown trout.
Salmon Salmon A salmon swims upstream, joining thousands of other salmon.
Mackerel Mackerel The mackerel is oily; mackerel are often canned.
Carp Carp We found a carp in the pond, alongside several other carp.
Pike Pike The northern pike is predatory; many pike live in this lake.
Series Series This series is great; both series are available online.
Species Species One species is endangered, but many species are thriving.

The second table compares swine with other nouns that change their internal vowels to form a plural (mutation plurals). This helps distinguish between different types of “irregularity.”

Table 2: Swine vs. Mutation Plurals
Singular Plural Type of Irregularity
Swine Swine Zero Plural
Man Men Vowel Mutation
Woman Women Vowel Mutation
Goose Geese Vowel Mutation
Foot Feet Vowel Mutation
Tooth Teeth Vowel Mutation
Mouse Mice Vowel Mutation
Louse Lice Vowel Mutation
Sheep Sheep Zero Plural
Die Dice Consonant Change
Child Children En-Plural
Ox Oxen En-Plural
Person People Suppletive Plural
Deer Deer Zero Plural
Cactus Cacti Latinate Plural
Focus Foci Latinate Plural
Phenomenon Phenomena Greek Plural
Criterion Criteria Greek Plural
Bison Bison Zero Plural
Alumnus Alumni Latinate Plural

The third table provides a list of sentences where swine is used as a plural noun. This is specifically to help you hear the “plurality” in the sentence even though the word itself doesn’t change.

Table 3: Plural Usage of “Swine” in Context
Sentence Number Contextual Sentence Clue for Plurality
1 The swine were fed at dawn. Verb “were”
2 Many swine are raised in Iowa. Determiner “Many”
3 Those swine look healthy. Determiner “Those” / Verb “look”
4 A dozen swine escaped the pen. Quantity “A dozen”
5 The swine huddled together for warmth. Collective action
6 We observed several swine in the wild. Determiner “several”
7 The swine are susceptible to the flu. Verb “are”
8 All of the swine have been vaccinated. Determiners “All of the” / Verb “have”
9 Three swine stood by the trough. Number “Three”
10 The swine’s ears were notched. (Plural Possessive) Context of the notches
11 These swine cost more than those. Determiner “These” / Verb “cost”
12 The swine represent a major export. Verb “represent”
13 Few swine survive in the desert. Determiner “Few” / Verb “survive”
14 Both swine weighed over 200 pounds. Determiner “Both”
15 The swine themselves were quite clean. Reflexive pronoun “themselves”
16 I saw no swine in the field. Determiner “no” (implies plural category)
17 The swine were led to the market. Verb “were”
18 Various swine breeds were displayed. Adjective “Various”
19 The swine are rooting for truffles. Verb “are”
20 The swine’s mud pit was huge. Shared possessive

Comprehensive Usage Rules and Syntax

Using swine correctly involves more than just knowing its plural form. It requires an understanding of subject-verb agreement and the use of determiners. Because the noun is invariant, the surrounding sentence structure must provide the “number” (singular or plural).

Rule 1: Subject-Verb Agreement

If the swine is the subject of your sentence, the verb must match the intended number. Use singular verbs (is, was, has, does) for one animal and plural verbs (are, were, have, do) for more than one.

Singular: The swine is eating. (One animal)
Plural: The swine are eating. (Multiple animals)

Rule 2: Determiners and Quantifiers

Determiners are words that come before nouns to clarify what the noun refers to. Some determiners only work with singular nouns, while others only work with plural nouns. Using the right one is key to being understood.

Singular: A swine, this swine, that swine, every swine.
Plural: These swine, those swine, many swine, several swine, two swine.

Rule 3: The Possessive Form

The possessive of swine follows standard rules, but can look a bit strange. For the singular possessive, you add ‘s (the swine’s snout). For the plural possessive, since the word doesn’t end in “s,” you also add ‘s (the swine’s food). This is different from regular plurals like pigs where the apostrophe goes after the s (the pigs’ food).

Table 4: Possessive Forms of Swine
Form Construction Example
Singular Possessive Swine + ‘s The swine’s pen was locked.
Plural Possessive Swine + ‘s All the swine’s troughs were filled.

Common Mistakes and How to Avoid Them

The most frequent error is the temptation to add an “s” to the end of the word. While “swines” does appear in some very old literature or specific poetic contexts, it is considered incorrect in Modern Standard English. Below are some common errors explained.

Mistake 1: Adding -s for Plurality

Incorrect: The farmer has twenty swines on his land.
Correct: The farmer has twenty swine on his land.

Why: Swine is a zero plural. The number “twenty” already tells the reader it is plural, so adding an “s” is redundant and grammatically wrong.

Mistake 2: Incorrect Verb Agreement

Incorrect: Those swine is very loud.
Correct: Those swine are very loud.

Why: “Those” is a plural determiner, so the verb must be the plural “are.”

Mistake 3: Confusing “Swine” with “Swine’s”

Incorrect: The swines tails were curly.
Correct: The swine’s tails were curly.

Why: Even in the plural, you do not add an “s” to the noun itself. To show possession, use the apostrophe-s.

Practice Exercises and Solutions

Testing your knowledge is the best way to ensure these rules stick. Complete the following exercises to practice identifying and using the plural of swine and related words.

Exercise 1: Fill in the Blanks

Choose the correct form of the verb or determiner to complete the sentence.

  1. (This / These) ________ swine is the prize winner of the fair.
  2. The herd of swine ________ (was / were) moving toward the stream.
  3. How many ________ (swine / swines) did you see in the forest?
  4. The ________ (swine’s / swines’) health is the farmer’s top priority.
  5. One ________ (sheep / sheeps) is missing, just like one swine is missing.
  6. (That / Those) ________ swine are known for their high-quality woolly hair.
  7. The laboratory studied the ________ (species / specieses) of swine found in Asia.
  8. Every ________ (swine / swines) must be accounted for by evening.
  9. The ________ (swine / swines) are rooting in the dirt for roots.
  10. A single ________ (swine / swines) can be quite aggressive if provoked.

Exercise 2: Error Correction

Identify and correct the error in each of the following sentences.

  1. We saw three swines at the petting zoo.
  2. The swine was all huddling together against the wind.
  3. Is these swine yours?
  4. The swines’s food was spilled on the ground.
  5. Many different swines species live in the wild.
  6. He called the thieves “greedy swines.”
  7. The vet checked the swine and found they was healthy.
  8. I have never seen so many swine in one place! (Wait, is this one correct?)
  9. A swine have four legs.
  10. Those swine’s are very large.

Solutions and Explanations

Table 5: Exercise 1 Solutions
Question Correct Answer Explanation
1 This “is” indicates singular.
2 was “Herd” is a collective singular subject.
3 swine Zero plural rule applies.
4 swine’s Possessive form for zero plurals.
5 sheep Sheep is also a zero plural.
6 Those “are” indicates plural.
7 species Species is a zero plural.
8 swine “Every” precedes a singular noun.
9 swine Zero plural rule applies.
10 swine “A single” indicates singular.
Table 6: Exercise 2 Solutions
Question Corrected Sentence Correction Made
1 We saw three swine at the petting zoo. Removed “s” from plural.
2 The swine were all huddling together… Changed verb to plural.
3 Is this swine yours? Changed “these” to “this” to match “is”.
4 The swine’s food was spilled… Fixed possessive spelling.
5 Many different swine species live… Removed “s” from adjective-noun.
6 He called the thieves “greedy swine.” Corrected plural insult.
7 The vet checked the swine and found they were healthy. Matched verb with “they”.
8 (Already Correct) No change needed.
9 A swine has four legs. Matched singular verb with “A”.
10 Those swine are very large. Removed unnecessary apostrophe-s.

Advanced Topics: Collective Nouns and Archaic Forms

For advanced learners, it is interesting to note that while swine is the plural, there are specific “collective nouns” used to describe groups of them. A group of swine can be called a sounder (specifically for wild swine/boars), a drift, or a parcel. When they are domestic, we usually just use herd.

There is also the matter of the word farrow. While not a plural for swine, it is a specific term for a litter of pigs. Using these specific terms can elevate your writing from basic to expert level. For example: “A sounder of wild swine emerged from the brush.” This sentence uses the zero plural correctly while also applying a sophisticated collective noun.

Furthermore, in older texts like the King James Bible, you might occasionally see “swines’ flesh.” This is an archaic possessive form. In modern English, we almost exclusively use “swine’s flesh” or “the flesh of swine.” Understanding that language evolves helps you interpret older literature without becoming confused by their different grammatical standards.

Frequently Asked Questions (FAQ)

Q: Is “swines” ever correct?
A: In modern standard English, no. “Swines” is considered an error. You might see it in very old books or in some non-standard dialects, but for exams, professional writing, and general use, “swine” is the only plural form.

Q: How do I know if “swine” is singular or plural in a sentence?
A: Look at the context clues. Words like a, one, this, that, is, and was indicate it is singular. Words like two, many, these, those, are, and were indicate it is plural.

Q: Can I just use “pigs” instead?
A: Yes, in most casual and even some professional situations, “pigs” is perfectly fine. However, “swine” is preferred in scientific, agricultural, and formal literary contexts.

Q: Is “swine” an insult?
A: Yes, it can be used as a derogatory term for a person who is perceived as greedy, contemptible, or disgusting. Even when used as an insult, the plural is still “swine.” (e.g., “You filthy swine!”)

Q: What is the difference between “swine” and “boar”?
A: “Swine” is the general term for the whole family. A “boar” is specifically an uncastrated male swine, or it can refer to the wild species (Wild Boar). The plural of boar is boars (regular) or sometimes boar (zero plural) in hunting contexts.

Q: Why do some animals have zero plurals and others don’t?
A: It’s mostly due to history. Words that have been in the English language since the Old English period (like sheep and swine) often kept their original plural forms, while newer words or words that changed more over time adopted the standard “-s” ending.

Q: Does “swine” refer to both males and females?
A: Yes, “swine” is a gender-neutral term for the animal. Specific terms for genders include boar (male), sow (female), gilt (young female), and barrow (castrated male).

Q: Is “swine flu” plural?
A: In the phrase “swine flu,” swine acts as an attributive noun (a noun acting like an adjective). It describes the type of flu. In this case, it doesn’t really have a number; it refers to the species as a whole.

Conclusion and Final Tips

Mastering the plural of swine is a gateway to understanding the fascinating history of the English language. By remembering that swine is a zero plural noun—just like sheep, deer, and fish—you can avoid one of the most common pitfalls in English grammar. Always look to the surrounding verbs and determiners to provide the necessary context for number. Whether you are writing a scientific paper on agriculture, reading a classic novel, or just expanding your vocabulary, using these irregular forms correctly will give your English a polished, authoritative tone. Keep practicing with different types of animals, and soon these irregular patterns will become second nature to you. Happy learning!

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