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Plurals of nouns

Most nouns form their plurals by simply adding –s to the end (e.g., cat/cats, book/books, journey/journeys). There are a number of exceptions to this rule, which are explained below.
 
Nouns ending in -y
 
If the noun ends with a consonant plus -y, make the plural by changing -y to -ies:
 
singular
plural
berry
berries
activity
activities
daisy
daisies
 
Nouns ending in -ch, -s, -sh, -x, or -z
 
If the noun ends with -ch, -s, -sh, -x, or -z, add -es to form the plural:
 
singular
plural
church
churches
bus
buses
fox
foxes
blintz blintzes
 
There is one exception to this rule. If the -ch ending is pronounced with a ‘k’ sound, you add -s rather than -es:
 
singular
plural
stomach
stomachs
epoch
epochs
 
Nouns ending in -f or -fe
 
With nouns that end in a consonant or a single vowel plus -f or -fe: change the -f or -fe to -ves:
 
singular
plural
knife
knives
half
halves
 
Nouns that end in two vowels plus -f usually form plurals in the normal way, with just an -s:
 
singular
plural
chief
chiefs
spoof
spoofs

 

Nouns ending in -o
 
Nouns ending in -o can add either -s or -es in the plural, and some can be spelled either way.

 

  •  As a general rule, most nouns ending in -o add -s to make the plural:
singular
plural
solo
solos
zero
zeros
avocado
avocados
 
  •  Those that have a vowel before the final -o always just add -s:
singular
plural
studio
studios
zoo
zoos
embryo
embryos
 
  • Here’s a list of the most common nouns ending in -o that are always spelled with -es in the plural:
singular
plural
echo
echoes
embargo
embargoes
hero
heroes
potato
potatoes
tomato
tomatoes
torpedo
torpedoes
veto
vetoes
 
  • Here are some of the common nouns ending in -o that can be spelled with either -s or -es in the plural:
singular
plural
banjo
banjos or banjoes
buffalo
buffalos or buffaloes
cargo
cargos or cargoes
domino
dominos or dominoes
flamingo
flamingos or flamingoes
fresco
frescos or frescoes
ghetto
ghettos or ghettoes
halo
halos or haloes
mango
mangos or mangoes
memento
mementos or mementoes
mosquito
mosquitos or mosquitoes
motto
mottos or mottoes
tornado
tornados or tornadoes
tuxedo tuxedos or tuxedoes
volcano
volcanos or volcanoes