When we put two or more words together to create a new word, we have made a compound noun.
Nouns of more than one word are called compound nouns.
|noun + noun||police officer||ice-cream||firefighter|
|noun + verb||carwash||haircut||milkshake|
|verb + noun||cross-road||cookbook||jump rope|
|adjective + noun||black eye||blue jeans||hotdog|
|adverb + noun||on-looker||downtime||overtime|
|adverb + verb||input||output||upswing|
Compound nouns can take three forms: hyphenated, solid and open.
When two or more words are connected by one or more hyphens, the result is a hyphenated compound. Some compound words are hyphenated to avoid being misread or ambiguous.
Solid compounds are words that are used as a single unit of meaning and it is closed up as solid, or closed, compounds.
Sometimes no hyphenating or closing up is necessary to form a compound. Open compounds are words that are used as a single unit of meaning but are still written separately as two words.
|wet nurse||roller coaster||whatever|
|sleeping bag||first aid||mug shot|
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