
Study Resource: English plural nouns reference sheet
The table below summarizes the rules for forming in English.
Noun Ending | Plural Rule | Singular | Plural | Notes |
Most regular nouns | Add -s | dogplant | dogsplants | Can be pronounced /s/ or /z/. |
-s, -ss, -sh, -ch, -x, -z… | Add -es | buschurchbox | buseschurchesboxes | An extra syllable is added. |
-f, -fe (only some nouns) | -f / -fe → -ves | knifeloaf | knivesloaves | Pronunciation of f changes too. |
-y (after a consonant) | -y → -ies | partycountry | partiescountries | No difference in pronunciation. After a consonant, just add -s. |
-o (only some nouns) | Add -es | tomatovolcano | tomatoesvolcanoes | No difference in pronunciation. |
Types of irregular nouns | ||||
Some animals we hunt to eat | NO CHANGE | fishdeer | fishdeer | Used particularly for swimming sea creatures (fish), deer, and some game animals |
Words that end in -craft | NO CHANGE | aircraft | aircraft | Some nouns that end in -craft are mass nouns, so they have no plural (witchcraft, stagecraft...). |
Some old nouns | Vowel change only | mangoose | mengeese | List is very short: foot, man, woman, goose, mouse, tooth, louse. |
child, ox, brother | Add -en | childoxbrother | childrenoxenbrethren | Vowel changes in children and brethren too. Brethren is old and not used for genetic brothers. |
Nouns ending in -us | -us → -i / -era | syllabusgenus | syllabigenera | Usually only Latin nouns. |
Nouns ending in -a | -a → -ae | alumnaformula | alumnaeformulae | Usually only Latin nouns. |
Nouns ending in -ix or -ex | -ix / -ex → -ices | matrixvortex | matricesvortices | Usually only Latin nouns. |
Nouns ending in -um | -um → -a | datumminimum | dataminima | Usually only Latin nouns. |
Nouns ending in -is | -is → -es | thesisaxis | thesesaxes | Usually only Latin nouns. |
Nouns ending in -on | -on → -a | criterionautomaton | criteriaautomata | Usually only Greek nouns. |
Nouns ending in -au | Add -x | châteaubeau | châteauxbeaux | Usually only French nouns. |
There is also a short list of irregular nouns that you’ll just need to memorize. Mostly:
person → people
die → dice
penny → pence (in England)