Singular and Plural Nouns

Nouns ending in o or ch, sh. ss or x form their plural by adding es:

Tomato: tomatoes, brush: brushes, box, boxes ; Church: churches,

But words of foreign origin or abbreviated words ending in o add s only:

Dynamo: dynamos, kimono: kimonos, piano: pianos ; kilo: kilos, photo : photos, soprano : sopranos

Nouns ending in y following a consonant form their plural by dropping the y and adding ies:

Baby: babies, country: countries, fly: flies, lady: ladies

Nouns ending in y following a vowel form their plural by adding s:

Boy: boys, day: days, donkey: donkeys, guy: guys.