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