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.

radio animation

radio animationradio animation

one radio

two radios

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

piano animation

piano animationpiano animation

one piano

two pianos

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

potato image

potato imagepotato image

one potato

two potatoes

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

zero animation

zero animationzero animation

one zero

two zeros – zeroes

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

 

 

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