Here's what rhymes with antiphonarium.
barium honorarium vivarium aquarium sanitarium planetarium Words that almost rhyme with antiphonarium
ovarian carrion clarion nobelium agrarian authoritarian barbarian sectarian antiquarian chameleon octogenarian sanitarian seminarian vulgarian cnidarian librarian vegetarian veterinarian centenarian nonagenarian proletarian libertarian disciplinarian trinitarian nonsectarian humanitarian utilitarian egalitarian totalitarian communitarian parliamentarian latitudinarian septuagenarian valetudinarian sexagenarian fermium millennium gentium requiem biennium endometrium proscenium technetium lutetium compendium lawrencium quadrennium