Here's what rhymes with protestative.
                        
                        
                    
                                dative  native  iterative  dissipative  evaporative  denotative  creative  legislative  imitative  oxidative  vegetative  deliberative  educative  meditative  radiative  dissociative  nonnative  cogitative  annotative  cooperative  authoritative  innovative  appreciative  associative  evaluative  connotative  procreative  emulative  quantitative  qualitative  collaborative  integrative  investigative  regulative  copulative  stimulative  administrative  interpretative  rehabilitative  unappreciative  manipulative  accumulative  nonadministrative  Words that almost rhyme with protestative
cages  sages  rages  phages  wadis  wadges  engages  mutatis  bellyaches  disengages  reengages  greengages  macrophages  evasive  plaintive  dissuasive  invasive  persuasive  pervasive  abrasive  unpersuasive  noninvasive  nonabrasive