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