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