Here's what rhymes with earthquack.
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 shellac flack highjack skyjack unpack zodiac ipecac repack anorak thumbtack rickrack cardiac elegiac maniac hardtack haversack piggyback gunnysack razorback pickaback mudpack paperback almanac quarterback lumberjack stickleback applejack crackerjack counterattack demoniac amnesiac insomniac steeplejack nymphomaniac megalomaniac Words that almost rhyme with earthquack
wag bag lag tag rag gag hag crag fag mag nag sag zag dag shag swag scrag flag drag slag stag brag snag fleabag washrag wigwag blag toerag dishrag scalawag scallywag chinwag nosebag sleazebag lollygag lallygag saddlebag 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 unmask outrank embank riverbank antitank charabanc databank pointblank