Here's what rhymes with tumourous.
glamourous Words that almost rhyme with tumourous
lulus clueless hulas truelove scrofulous hallelujahs newness mucous mucus nuisance lupus moonless chukkas houmous houmus units useless ruthless coolness eunuchs humus rudeness smoothness hubris toothless blueness lewdness roofless rootless bootless muteness mullets ulnas tuneups movements fruitless prudence mutants pursuance cubits shrewdness aloofness fluence tulips tumults congruous crudeness caduceus annuitants cuteness humourless intuits juleps gullets glumness sublets cutups manumits bouffants students foodstuffs pollutants acuteness imprudence impudence astuteness avoirdupois obtuseness diffuseness truants canoeists coolants duellists spruceness hirsuteness amusements inducements absoluteness dissoluteness translucence abstruseness profuseness improvements persecutions disputants exiguous resoluteness jurisprudence quadruplets irresoluteness