Here's what rhymes with cupiditous.
Words that almost rhyme with cupiditous
precipitous serendipitous ubiquitous siliceous spirituous spiritless duplicitous piggishness willingness fierceness iniquitous priggishness derisiveness griminess jinrickshas jinrikshas filminess certificates permissiveness implicitness litigants submissiveness explicitness cliquishness skittishness significance coincidence vindictiveness restrictiveness distinctiveness descriptiveness insignificance