cachinnation

an explosive sound that is a sign of amusement as is common in some forms of schizophrenia, the patient would often erupt in cachinnation, often at the most inappropriate times Synonyms belly laugh, boff (or boffo), boffola, laugh, cackle, chortle, chuckle, giggle, guffaw, hee-haw, horselaugh, laughter, snicker, snigger, titter, twitterRelated Words crow, whoop; grin, simper, smile, smirkNear Antonyms cry, groan, moan, sob, wail; face, frown, grimace, lower (also lour), mouth, pout, scowl