Here's what rhymes with declivious.
oblivious lascivious Words that almost rhyme with declivious
forsythias ligneous serious hideous delirious bilious grittiness tibias imperious insidious vitreous weariness invidious pitiless giddiness chilliness prettiness silliness riskiness trickiness bitchiness wittiness hilliness tinniness bleariness experience mysterious affiliates dizziness resilience amphibious ignominious lineaments punctilious stickiness filthiness flimsiness milkiness silkiness incipience pithiness tipsiness friskiness prissiness skinniness recipients deleterious initiates fastidious conciliates percipience propitiates princeliness skimpiness disaffiliates inexperience supercilious miscreants consanguineous