See cackle in Webster's New World Roget's A-Z Thesaurus II
verb
To express amusement, mirth, or scorn by smiling and emitting loud, inarticulate sounds:
cachinnate, guffaw, laugh. (Informal) heehaw. Idioms: die laughing, laugh one's head off, roll in the aisles, split one's sides. See laughter, sounds
noun
An act of laughing:
cachinnation, guffaw, laugh, laughter. (Informal) heehaw. See laughter, sounds
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