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Singular-PluralNouns Ending in O Nouns ending in the letter o preceded by a vowel form the plural by adding the letter s.
photos
pianos
cellos
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
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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
o becomes os | auto | autos | kangaroo | kangaroos | kilo | kilos | memo | memos | photo | photos | piano | pianos | pimento | pimentos | pro | pros | solo | solos | soprano | sopranos | studio | studios | tattoo | tattoos | video | videos | zoo | zoos |
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