List of Nouns By adding -es to nouns ending in -o

Some nouns ending in -o form their plurals by adding -es instead of just -s. The following table lists common examples showing the singular and plural forms of these nouns.

Singular	Plural
buffalo*	buffaloes*
echo	echoes
hero	heroes
mosquito	mosquitoes
potato	potatoes
tomato	tomatoes
torpedo	torpedoes
veto	vetoes
volcano*	volcanoes*
cargo*	cargoes*
domino*	dominoes*
mango*	mangoes*
tornado*	tornadoes*
motto*	mottoes*
grotto*	grottoes*
halo*	haloes*
calico*	calicoes*
fresco*	frescoes*
flamingo*	flamingoes*
zero*	zeroes*

Words marked with * can also take -s (e.g., buffalos, volcanos, mangos, zeros).