Noun ending in o and add es?

You're asking about nouns ending in "o" that add "es" to form the plural. Here's the breakdown:

General Rule: Most nouns ending in "o" form their plural by adding "s".

Exceptions:

* Nouns ending in "o" preceded by a consonant add "es":

* tomato -> tomatoes

* hero -> heroes

* potato -> potatoes

* Some nouns ending in "o" preceded by a vowel also add "es":

* echo -> echoes

* veto -> vetoes

* buffalo -> buffaloes (though buffalo is also acceptable)

Exceptions to the exceptions:

* Musical terms ending in "o" often add "s":

* soprano -> sopranos

* alto -> altos

* piano -> pianos

* Some nouns ending in "o" are irregular:

* child -> children

* foot -> feet

* tooth -> teeth

Remember: If you are unsure about the plural of a specific noun ending in "o," always consult a dictionary.