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