Here's what rhymes with whack.
alk wack back lack pack nach rack sac sack hack jack tack fac knack lac shack mac mak quack tak wrack yak mack yack black attack track crack stack plaque slack aback smack snack flak clack claque flack shellac unpack ipecac repack anorak highjack elegiac maniac zodiac thumbtack rickrack mudpack skyjack cardiac paperback almanac hardtack haversack piggyback gunnysack razorback pickaback quarterback demoniac lumberjack amnesiac applejack crackerjack counterattack stickleback insomniac steeplejack nymphomaniac megalomaniac Words that almost rhyme with whack
ag wag bag lag tag rag gag hag fag mag nag sag zag dag shag swag flag drag slag stag brag crag snag washrag blag toerag dishrag fleabag scrag wigwag chinwag nosebag scalawag scallywag sleazebag lollygag lallygag saddlebag ask anc ankh bank task rank tank thank mask sank cask masque shank bask dank hanc lank talc hank yank swank basque blank drank flank flask frank crank plank shrank franc prank clank spank stank unmask outrank embank riverbank antitank databank charabanc pointblank