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