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