Here's what rhymes with polyphonic.
                        
                        
                    
                                sonic  phonic  ionic  tonic  conic  chronic  ironic  demonic  iconic  mnemonic  laconic  symphonic  telephonic  bionic  avionic  harmonic  tectonic  ultrasonic  chorionic  colonic  sardonic  isotonic  platonic  subsonic  daemonic  monophonic  acetonic  electronic  hegemonic  supersonic  diachronic  histrionic  hypertonic  synchronic  catatonic  diatonic  stereophonic  infrasonic  quadraphonic  quadrophonic  embryonic  ganglionic  monotonic  planktonic  hydroponic  philharmonic  pathognomonic  architectonic  microelectronic  Words that almost rhyme with polyphonic
comic  atomic  anatomic  autonomic  genomic  ergonomic  tragicomic  economic  taxonomic  diatomic  agronomic  subatomic  astronomic  macroeconomic  uneconomic  gastronomic  socioeconomic  microeconomic  folic  hayrick  logic  topic  erotic  exotic  gothic  boric  euphoric  formic  frolic  cirrhotic  seraphic  rollick  historic  alcoholic  cosmic  toxic  aortic  chaotic  garlic  caustic  despotic  psychotic  idiotic  phenolic  tropic  atopic  biotic  cathodic  gnostic  iambic  karmic  lethargic  meiotic  myopic  prosodic  robotic  bardic  heartsick  rhapsodic  strophic  allegoric  subtopic  carsick  chocoholic  chocaholic  symbolic  periodic  aquatic  hydraulic  neurotic  philosophic  caloric  episodic  hypnotic  melodic  narcotic  pathologic  systolic  ascorbic  carbolic  isotopic  parabolic  pyloric  semiotic  synoptic  anabolic  anarchic  anoxic  basaltic  cathartic  fibrotic  hypoxic  nephrotic  oligarchic  orthodontic  peristaltic  polymorphic  quixotic  sclerotic  telescopic  arthroscopic  bucolic  folkloric  hierarchic  gyroscopic  workaholic  theosophic  chopstick  shambolic  placekick  horologic  patriotic  apostolic  physiologic  prehistoric  biologic  diastolic  geologic  histologic  isotropic  macroscopic  neurologic  anisotropic  hyperbolic  metaphoric  morphologic  necrotic  psychologic  spasmodic  symbiotic  yardstick  agnostic  meteoric  pedagogic  thrombotic  demagogic  diabolic  homoerotic  vitriolic  xenophobic  acrostic  ecologic  subarctic  sophomoric  subtropic  aetiologic  shopaholic  astronautic  diagnostic  metabolic  microscopic  antibiotic  catastrophic  cytotoxic  philanthropic  prognostic  endoscopic  etiologic  melancholic  nontoxic  psychotropic  stereoscopic  antarctic  fluoroscopic  misanthropic  nonalcoholic  macrobiotic  posthypnotic  meteorologic  nonnarcotic  noncaloric  seismologic  hydrochloric  atherosclerotic  immunologic  metamorphic  pharmacologic  spectroscopic  hematologic  bacteriologic  kaleidoscopic  microcosmic  unpatriotic  antispasmodic  stroboscopic  haematologic  gynaecologic  anthropomorphic  gynecologic  submicroscopic  electroscopic  epidemiologic