1. Plural Nouns Ending with “O”

2. Nouns that end in a vowel followed by the letter “o”, just add “s”
Vowel + “o”
Examples:
One radio two radios
One kangaroo two kangaroos
One zoo two zoos
One stereo two stereos

3. In fact, most words ending with “o”, just add “-s”, for example…
Words that end in “o” and are a shortened version of a longer word, just add “-s”.
Ex. photo, photos
Proper nouns that end in “o”, just add “-s”.
Ex. Eskimo, Eskimos
Spanish and Italian words that end in “o”, just add “-s”.
Ex. taco, tacos
Musical terms that end in “o”, just add “-s”
Ex. solo, solos
Words that are newer to the English language that end in “o”, just add “s”.
Ex. casino, casinos

4. So, in other words, to make most nouns ending in “o” plural, just add “-s”. Except for…

5. Except for these words. These nouns must be spelled with an “-es”:
Hint: Just memorize these words!
Add “-es” potato potatoes tomato tomatoes echo echoes hero heroes veto vetoes embargo embargoes torpedo torpedoes

6. Also, some nouns can be made plural by either adding an “-s” or an “-es”.
Singular Plural add “s” Plural add “es”
buffalo buffalos buffaloes
domino dominos dominoes
ghetto ghettos ghettoes
mango mangos mangoes
mosquito mosquitos mosquitoes
motto mottos mottoes
tornado tornados tornadoes
volcano volcanos volcanoes
zero zeros zeroes
Hint: The bold print word is the preferred way to spell the plural noun.

7. So, the rule for nouns ending in “o” is simple; most nouns you just add an “-s” to the end of the word to make them plural, except for a few random words which you must memorize.
Questions?