Common Compound Words:
* Playbill: A printed program of a theatrical performance.
* Playboy: A man who enjoys a life of pleasure and leisure.
* Playground: An area designed for children to play.
* Playhouse: A small house for children to play in.
* Playmate: A person who plays with another.
* Plaything: A toy or object for playing with.
* Playwright: A person who writes plays.
Less Common Compound Words:
* Play-acting: The act of pretending or imitating.
* Play-by-play: A detailed description of an event as it happens.
* Play-off: A series of games to determine a winner.
* Playtime: A period of time for playing.
* Play-wear: Clothing suitable for playing in.
* Play-writing: The art of writing plays.
Other Compound Words:
* Playful (not strictly a compound word, but derived from "play")
* Playfully
* Playfulness
Note: Some of these words may be considered more informal or archaic.