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