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