Here's what rhymes with nonbarbarian.
barbarian carrion agrarian librarian ovarian antiquarian clarion vulgarian authoritarian proletarian sectarian libertarian vegetarian nonsectarian nonagenarian utilitarian egalitarian totalitarian trinitarian octogenarian centenarian sanitarian cnidarian humanitarian communitarian veterinarian parliamentarian seminarian disciplinarian latitudinarian valetudinarian septuagenarian sexagenarian Words that almost rhyme with nonbarbarian
barium aquarium chameleon honorarium vivarium nobelium sanitarium planetarium ferryman ferrymen lesbian pedestrian thespian vestrymen vestryman equestrian