smiling, laugh, guffaw, chuckle, chortle, cackle, howl, roar, ha-ha, fall about, roar/hoot with laughter, shake with laughter, be convulsed with laughter, dissolve into laughter, split one's sides, be doubled up; informalbe in stitches, die laughing, be rolling in the aisles, laugh like a drain, bust a gut, break up, be creased up, crease up, crack up