Spelling Plural Nouns

Here are some general rules for spelling plural nouns.

NounsPluralExamples
Most nounsadd sbook, books; cup, cups; sprout, sprouts
Most nouns that end in ch, sh, s, x, or z add esbox, boxes; bus, buses; prize, prizes
Most nouns that end in a vowel and yadd sboy, boys; day, days; key, keys
Most nouns that end in a consonant and yy becomes iesbaby, babies; country, countries; spy, spies
Most nouns that end in f or fef or fe becomes veself, elves; loaf, loaves; thief, thieves
Most nouns that end in oadd skangaroo, kangaroos; piano, pianos; video, videos
Certain nouns that end in a consonant and o add eshero, heroes; potato, potatoes; volcano, volcanoes

Some Exceptions


Geese

Certain English nouns change a vowel sound when they become plural. These include goose, geese; man, men; mouse, mice; and tooth, teeth.

Some nouns don't change at all when they become plural. These include deer, fish, sheep, and species.

A few nouns have plural forms that are left from Old English. These include child, children and ox, oxen.


Ten Tips for Better SpellingGrammar and SpellingSpelling the “Seed” Sound

More on Spelling Plural Nouns from Fact Monster: