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