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