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