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