General Synonyms:
* Dumb charades (the most common synonym)
* Mime
* Pantomime
* Acting out
* Guessing game
* Word game
Similar Games:
* Pictionary (drawing instead of acting)
* Taboo (giving clues but not saying the word)
* 20 Questions (asking yes/no questions to guess the word)
Informal terms:
* Acting it out
* Silent game
* Guess who
The best word to use will depend on the context. For example, if you're talking about a specific game, you might use "dumb charades." If you're talking about the general concept of acting something out, you might use "mime" or "pantomime."