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