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