(n.) The quality of being risible; as, risibility is peculiar to the human species.

Homeric laughter belly laugh boff boffola burst of laughter cachinnation cackle chortle chuckle convulsion crow fit of laughter funny bone gales of laughter giggle guffaw ha-ha hearty laugh hee-haw hee-hee hilarity ho-ho horselaugh laugh laughing laughter outburst of laughter peal of laughter roar of laughter sense of humor shout shout of laughter shriek snicker snort tee-hee titter yuck yuk-yuk