THESAURUS
Flail
bang, baste, bastinado, batter, beat, belabor, belt, birch, buffet, cane, club, cowhide, cudgel, cut, cut and thrust, drub, feint, flagellate, flail at, flail away at, flap, flog, fustigate, give a whipping, give the stick, hammer, hit at, horsewhip, knock, knout, lace, lambaste, larrup, lash, lash out at, lay on, let drive at, let fly at, lunge at, maul, paste, patter, pelt, pistol-whip, poke at, pommel, pound, pulverize, pummel, rap, rawhide, scourge, sledgehammer, smite, spank, strap, strike at, strike out at, stripe, swing at, swing on, swinge, switch, thrash, thresh, thrust at, thump, trounce, truncheon, wallop, whale, whip, whop
ROGET THESAURUS
Flail
Impulse
N
impulse, sudden thought, impromptu, improvisation, inspiration, flash, spurt, improvisatore, creature of impulse, extemporaneous, impulsive, indeliberate, snap, improvised, improvisate, improvisatory, unpremeditated, unmeditated, improvise, unprompted, unguided, natural, unguarded, spontaneous, instinctive, extempore, extemporaneously, offhand, impromptu, a limproviste, improviso, on the spur of the moment, on the spur of the occasion, impulse, impulsion, impetus, momentum, push, pulsion, thrust, shove, jog, jolt, brunt, booming, boost, throw, explosion, propulsion, percussion, concussion, collision, occursion, clash, encounter, cannon, carambole, appulse, shock, crash, bump, impact, elan, charge, beating, blow, dint, stroke, knock, tap, rap, slap, smack, pat, dab, fillip, slam, bang, hit, whack, thwack, cuff, squash, dowse, swap, whap, punch, thump, pelt, kick, punce, calcitration, ruade, arietation, cut, thrust, lunge, yerk, carom, carrom, clip, jab, plug, sidewinder, sidewipe, sideswipe, hammer, sledge hammer, mall, maul, mallet, flail, ram, rammer, battering ram, monkey, pile-driving engine, punch, bat, cant hook, cudgel, ax, dynamics, seismometer, accelerometer, earthquake detector, impelling, impulsive, impellent, booming, dynamic, dynamical, impelled, a hit, a very palpable hit.