behave vs act involuntarily

Other hyponyms of behave include act reflexively, bend over backwards, fall over backwards, presume, vulgarise, vulgarize, optimise, optimize, quack, menace, make, bluster, swagger, swash, freeze, wanton, romanticize, sentimentalise, sentimentalize, sentimentise, sentimentize, bungle, play, toy, act, act as, play, stooge, jest, joke, piffle, make, make as if, break down, lose it, snap, fluster, dally, dawdle, assert, put forward, backslap, deal, hugger mugger, walk around, sauce, pose, posture, footle, frivol, trifle, puff up, swell, follow, loosen up, relax, rage, ramp, storm, wildin', spaz, thug.