Compound nouns

A compound noun is a noun that is made with two or more words. A compound noun is usually [noun + noun] or [adjective + noun], but there are other combinations (see below). It is important to understand and recognize compound nouns. Each compound noun acts as a single unit and can be modified by adjectives and other nouns.

There are three forms for compound nouns:

open or spaced - space between words (tennis shoe)
hyphenated - hyphen between words (six-pack)
closed or solid - no space or hyphen between words (bedroom)

NOTE: There are no definate rule stating which rule to use. Be safe and look up the words you need in a dictionary.

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