Learn English-Plural Noun and its Rule and E...

Most singular nouns are made plural by simply putting an -s at the end. 

There are many different rules regarding pluralization depending on what
letter a noun ends in. Irregular nouns do not follow plural noun rules,
so they must be memorized or looked up in the dictionary.

Spelling of plurals: 

The plural form of most nouns is created simply by adding the letter "s". 

• more than one snake = snakes 
• more than one girl = girls 
• more than one window = windows 

Nouns that end in -ch, x, s, z or s-like sounds, however, will require an es for the plural: 

•  more than one witch = witches 
•  more than one box = boxes 
•  more than one gas = gases 
•  more than one bus = buses 
• more than one kiss = kisses 

Nouns that end in a vowel + y take the letter s: 

• more than one boy = boys 
• more than one way = ways 

Nouns that end in a consonant + y drop the y and take ies:

•  more than one baby = babies 
•  more than one lorry = lorries 

A lot of nouns that end in o take es in the plural: 

• more than one potato = potatoes 
•  more than one hero = heroes

Plurals formed in this way are sometimes called irregular plurals or mutated (or mutating) plurals.

• more than one child = children
• more than one woman = women
• more than one man = men
• more than one person = people
• more than one goose = geese
• more than one mouse = mice
• more than one barracks = barracks
• more than one deer = deer