General synonyms:
* chuckle
* giggle
* snicker
* guffaw
* cackle
* chortle
* roar
* titter
Synonyms for different types of laughter:
* Joyful: beam, grin, smile
* Nervous: fidget, squirm, fidget
* Condescending: smirk, sneer, scoff
* Derisive: jeer, mock, scoff
Other related words:
* Amuse: to cause someone to laugh
* Humor: the quality of being funny
* Funny: causing laughter
* Entertainment: something that amuses or entertains
Choosing the best synonym depends on the specific situation and the tone you want to convey.