| Thwack 1. (v. t.) To strike with something flat or heavy; to bang, or thrash: to thump. 2. (v. t.) To fill to overflow. 3. (n.) A heavy blow with something flat or heavy; a thump. Thesaurus Entries 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 | ![]() |