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