Here's what rhymes with ciduous.
congruous exiguous Words that almost rhyme with ciduous
chukkas lupus newness toothless tulips blueness bootless caduceus 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 clueless truants duellists intuits mullets gullets hirsuteness ulnas bouffants students fruitless acuteness cubits shrewdness smoothness hubris crudeness scrofulous muteness annuitants canoeists coolants cuteness glumness sublets spruceness cutups movements foodstuffs mutants pollutants imprudence impudence absoluteness diffuseness dissoluteness resoluteness humourless abstruseness glamourous manumits amusements persecutions inducements quadruplets profuseness irresoluteness improvements jurisprudence disputants translucence