Here's what rhymes with synergistic.
                        
                        
                    
                                artistic  cystic  mystic  autistic  logistic  sadistic  inartistic  simplistic  statistic  ballistic  theistic  animistic  juristic  monistic  patristic  egotistic  shamanistic  sophistic  nepotistic  linguistic  realistic  stylistic  holistic  humanistic  journalistic  mechanistic  pessimistic  dualistic  moralistic  socialistic  atheistic  egoistic  fatalistic  hedonistic  legalistic  novelistic  syllogistic  eulogistic  surrealistic  voyeuristic  aphoristic  jingoistic  belletristic  puristic  characteristic  optimistic  unrealistic  deterministic  heuristic  idealistic  monopolistic  nationalistic  naturalistic  altruistic  opportunistic  rationalistic  relativistic  ritualistic  communistic  futuristic  militaristic  monotheistic  pantheistic  polycystic  cannibalistic  chauvinistic  euphemistic  feudalistic  casuistic  antagonistic  materialistic  anachronistic  capitalistic  narcissistic  paternalistic  pluralistic  imperialistic  impressionistic  oligopolistic  positivistic  polytheistic  pugilistic  probabilistic  expressionistic  overoptimistic  individualistic  sociolinguistic  uncharacteristic  universalistic  spiritualistic  Words that almost rhyme with synergistic
flyspeck  dipstick  diptych  picnic  lipstick  haemolytic  lytic  triptych  critic  analytic  civic  lyric  terrific  acidic  hemolytic  mimic  mythic  citric  cryptic  elliptic  idyllic  phenotypic  physic  rabbinic  satiric  syphilitic  cynic  lithic  thymic  gimmick  pinprick  cenobitic  nitpick  sylphic  clinic  intrinsic  rhythmic  parasitic  acrylic  ecliptic  granitic  hemispheric  limbic  pacific  paralytic  arthritic  empiric  honorific  impolitic  arrhythmic  nephritic  periwig  juridic  zoophytic  specific  scientific  apocalyptic  catalytic  monolithic  prolific  dendritic  horrific  hydrolytic  metaphysic  neolithic  porphyritic  saprophytic  bulimic  hermaphroditic  encephalitic  philippic  coenobitic  bromidic  nonrhythmic  psychoanalytic  extrinsic  hydrophilic  proteolytic  unscientific  antiarrhythmic  basophilic  eosinophilic  thrombolytic  megalithic  unspecific  pantomimic  logarithmic  nonspecific  electrolytic  algorithmic  carboxylic  fibrinolytic  hieroglyphic  organismic  antisemitic  patronymic  nonscientific  palaeolithic  paleolithic  cataclysmic  stratospheric  transpacific  polyclinic