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