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