Here's what rhymes with mouth.
south drouth cottonmouth Words that almost rhyme with mouth
mouse aus mows house cows arouse bows vows boughs rouse louse dhows douse hows cowers louche thous wows chows dowse loughs pouffe taus allows spouse blouse brows browse grouse endows ploughs plows avows carouse prows scows drowse haymows espouse menopause powerhouse boathouse firehouse summerhouse windrows cornrows snowploughs hedgerows coffeehouse meetinghouse disavows packinghouse boardinghouse clearinghouse slaughterhouse porterhouse prognathous