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