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