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Compound Nouns

Compound nouns are nouns that consist of two or more words.

Many compound nouns are written as one word.
Their plural is formed in the regular way.

Singular	Plural
classroom	classrooms
dishwasher	dishwashers
screwdriver	screwdrivers

Some compound nouns are written as two words, or two words joined by a hyphen.
The plural is formed by adding s to the second word.

Singular	Plural
book club	book clubs
fire engine	fire engines
ice-cream	ice-creams
baby-sitter	baby-sitters

Some compound nouns consist of three or more hyphenated words.
If the first wood is a noun then add s to the first word.

Singular	Plural
son-in-law	sons-in-law
lady-in-waiting	ladies-in-waiting
lily-of-the-valley	lilies-of-the-valley
passer-by	passers-by

If the first word is not a noun then add s to the end of the compound word.

Singular	Plural
two-year-old	two-year-olds
forget-me-not	forget-me-nots

Pronunciation of Compound Nouns

In compound nouns, the stress usually falls in the first syllable. Have a look at the following video for a lesson on the pronunciation of compound nouns.

Compound Nouns and Pronunciation How to pronounce compound nouns?

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