THESAURUS
Thwack
bang, bash, bat, beating, belt, biff, blow, bonk, bop, bump, burst, bust, chop, clap, clash, clip, clobber, clout, clump, coldcock, crack, crash, crump, cut, dash, deal, deal a blow, deck, dig, dint, drub, drubbing, drumming, fetch, fetch a blow, flap, flop, fusillade, hit, hit a clip, jab, knock, knock cold, knock down, knock out, let have it, lick, paste, pelt, plunk, poke, pound, punch, rap, report, slam, slap, slat, slog, slug, smack, smash, smite, snap, soak, sock, splat, strike, strike at, stroke, swap, swat, swing, swipe, tap, tattoo, thump, wallop, welt, whack, wham, whap, whomp, whop, yerk
ROGET THESAURUS
Thwack
Punishment
VB
punish, chastise, chasten, castigate, correct, inflict punishment, administer correction, deal retributive justice, cowhide, lambaste, visit upon, pay, pay out, serve out, do for, make short work of, give a lesson to, serve one right, make an example of, have a rod in pickle for, give it one, strike, deal a blow to, administer the lash, smite, slap, slap the face, smack, cuff, box the ears, spank, thwack, thump, beat, lay on, swinge, buffet, thresh, thrash, pummel, drub, leather, trounce, sandbag, baste, belabor, lace, lace one's jacket, dress, dress down, give a dressing, trim, warm, wipe, tund, cob, bang, strap, comb, lash, lick, larrup, wallop, whop, flog, scourge, whip, birch, cane, give the stick, switch, flagellate, horsewhip, bastinado, towel, rub down with an oaken towel, rib roast, dust one's jacket, fustigate, pitch into, lay about one, beat black and blue, beat to a mummy, beat to a jelly, give a black eye, tar and feather, pelt, stone, lapidate, masthead, keelhaul, execute, bring to the block, bring to the gallows, behead, decapitate, guillotine, decollate, hang, turn off, gibbet, bowstring, hang draw and quarter, shoot, decimate, burn, break on the wheel, crucify, empale, impale, flay, lynch, electrocute, gas, send to the gas chamber, torture, put on, put to the rack, picket, banish, exile, transport, expel, ostracize, rusticate, drum out, dismiss, disbar, disbench, strike off the roll, unfrock, post, suffer, suffer for, suffer punishment, be flogged, be executed, suffer the ultimate penalty, be hanged, come to the gallows, mount the gallows, swing, twist in the wind, dance upon nothing, die in one's shoes, be rightly served, be electrocuted, fry, ride the lightning, face the firing squad.
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.
VB
flash on the mind, say what comes uppermost, improvise, extemporize, give an impetus, impel, push, start, give a start to, set going, drive, urge, boom, thrust, prod, foin, cant, elbow, shoulder, jostle, justle, hustle, hurtle, shove, jog, jolt, encounter, run against, bump against, butt against, knock one's head against, run one's head against, impinge, boost, bunt, carom, clip y, fan, fan out, jab, plug, strike, knock, hit, tap, rap, slap, flap, dab, pat, thump, beat, blow, bang, slam, dash, punch, thwack, whack, hit hard, strike hard, swap, batter, dowse, baste, pelt, patter, buffet, belabor, fetch one a blow, poke at, pink, lunge, yerk, kick, calcitrate, butt, strike at, whip, come into a collision, enter into collision, collide, sideswipe, foul, fall foul of, run foul of, telescope, throw.