Here's what rhymes with retroactive.
                        
                        
                    
                                proactive  reactive  inactive  radioactive  overactive  attractive  interactive  refractive  vasoactive  psychoactive  nonactive  hyperactive  putrefactive  nonreactive  unattractive  extractive  nonradioactive  counteractive  immunoreactive  Words that almost rhyme with retroactive
captive  massive  passive  adaptive  impassive  maladaptive  combative  expansive  contrastive