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