Here's what rhymes with megathere.
their there fair hair share fare faire hare cher fere sehr where care bear chair pair rare wear affair bare dare spare swear tear mare stare ware flare mer pear scare snare stair flair guerre lair mehr affaire mair pare thair coheir aware square prayer unfair glare thoroughfare blare funfair anywhere compare despair repair unaware beware forbear impair earthenware aftercare bugbear curare ensnare midair medicare parterre repairer overbear spyware eldercare camelhair backstair ovenware everywhere prepare declare millionaire underwear debonair horsehair solitaire forswear chinaware dinnerware maidenhair outerwear tinware ironware millionnaire beachwear debonaire wirehair questionnaire silverware disrepair billionaire commissionaire foursquare kitchenware legionnaire broodmare foreswear setsquare doctrinaire tableware concessionaire extraordinaire multimillionaire Words that almost rhyme with megathere
cell fell sell hell shell celle sel well tell del bell smell gel spell swell tel dell delle nel yell belle weal bel gazelle knell nell telle jell hotel dwell excel befell gaol nouvelle quell pastel quel resell morel novelle outsell noel personnel compel farewell dispel expel repel cartel foretell motel unwell impel lapel carousel retell caravel undersell nacelle carrousel oversell parallel citadel infidel propel decibel organelle photocell bagatelle commonweal misspell muscatel clientele mademoiselle materiel fontanelle nonparallel tagliatelle zinfandel antipersonnel therefor