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