A word that is made up of two or more existing words and contains no spaces or hyphens, e.g. football, birthday, blackboard.
- The usual progression of a compound word is from two separate words, to a hyphenated compound, to a closed compound.
- Depending on how they are used, two words may eventually be combined as a closed compound word.
- Hyphenated compound words are usually in the transition period from open to closed compound words.
Definition of closed compound in:
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