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