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