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