Nouns:
* Playwright: A person who writes plays.
* Plaything: A toy or object used for amusement.
* Playhouse: A small house for children to play in.
* Playback: The reproduction of a recorded sound.
* Gameplay: The way a game is played.
* Playoff: A series of games to determine a champion.
* Playmate: Someone who plays with you.
* Playbill: A program for a theatrical performance.
* Playful: Full of fun and lightheartedness.
* Playfulness: The quality of being playful.
Verbs:
* Playfully: In a playful manner.
* Replay: To play again.
* Underplay: To minimize or downplay.
* Overplay: To exaggerate or emphasize excessively.
Adjectives:
* Playable: Suitable for playing.
* Playful: Having a tendency to play or tease.
Other:
* Plaything: An object used for amusement.
* Playhouse: A small house for children to play in.
* Playmate: Someone who plays with you.
* Playbill: A program for a theatrical performance.
* Playfully: In a playful manner.
* Playtime: A period of time for play.
* Playgroup: A group of children who play together.
These are just a few examples, and there are many other words with the root "play." The specific meaning of each word depends on the context in which it is used.