Singular-Plural

Nouns Ending in O

When you are finished, try the Nouns Ending in O Quiz.

Nouns ending in the letter o preceded by a vowel form the plural by adding the letter s.

Most nouns ending with the letter o preceded by a consonant add the letter s to form the plural

Some nouns ending in the letter o preceded by a consonant add es to form the plural

Others that add es include:

• echo - echoes

• hero - heroes

• jingo - jingoes

• no - noes

• tomato - tomatoes

Some nouns ending with the letter o preceded by a consonant can form the plural two ways

Others that form the plural with both s and es include:

• buffalo - buffalos or buffaloes

• cargo - cargos or cargoes

• desperado - desperados or desperadoes

• halo - halos or haloes

• mosquito - mosquitos or mosquitoes