The Most Common Irregular Plural Nouns in English

The majority of English count nouns are predictable in the spelling of the plural form. however, there are several nouns, which are irregular in their spelling

Common Irregular Plural Nouns in English

Changing the spelling of singular noun:

For Examples:

• person – people
• ox – oxen
• man – men
• woman – women
• caveman – cavemen
• policeman – policemen
• child – children
• tooth – teeth
• foot – feet
• goose – geese
• mouse – mice
• mouse – lice

Some nouns use the same singular and plural form:

For Examples:

• aircraft – aircraft
• barracks – barracks
• deer – deer
• gallows – gallows
• moose – moose
• salmon – salmon
• hovercraft – hovercraft
• spacecraft – spacecraft
• series – series
• species – species
• means – means
• offspring – offspring
• deer – deer
• fish – fish
• sheep –  sheep

Some nouns are of Latin/Greek/French Origin:

For Examples:

Nouns of Latin Origin:

• alumnus – alumni/alumnuses
• apex – apices/apeces
• appendix – appendices/ appendixes

Nouns of French Origin:

For Examples:

• chateau – chateaux/chateaus
• bureau – bureaux/ bureaus
• tableau – tableaux/tableaus

Nouns of Greek Origin:

For Examples:

• diagnosis – diagnoses
• ellipsis – ellipses
• hypothesis – hypotheses
• oasis – oases