kind of a noun (ending of singular)	ending of plural change if exists	singular	plural	exception
regular for example -k -m and others	-s	book plum blanket	books plums blankets	--------(?)
-s -ss -x -ch -sh	-es	bus moss box match bush	buses mosses boxes matches bushes	--------(?)
-e	-s	orange bicycle	oranges bicycles	--------(?)
-o	-es	tomato potato	tomatoes potatoes	piano-pianos zero-zeros
-f -fe	-ves	knife leaf	knives leaves	chief-chiefs cliff-cliffs
-(consonant)+y	-ies	baby city	babies cities	zloty-zlotys
-(vowel)+y	-s	boy day	boys days	--------(?)
irregular	---------	man woman mouse child foot tooth penny goose policeman(etc.)	men women mice children feet teeth pence geese policemen(etc.)	--------

Nouns that are the same singular and plural.

carp, fish, fruit, deer species, sheep, swine, means