Here's what rhymes with synthetic.
                        
                        
                    
                                fetich  aesthetic  acetic  ascetic  esthetic  poetic  sympathetic  athletic  pathetic  phonetic  emetic  hermetic  parenthetic  bathetic  magnetic  genetic  energetic  kinetic  prophetic  anesthetic  cosmetic  anaesthetic  apathetic  biosynthetic  empathetic  frenetic  kinesthetic  antithetic  homiletic  gametic  unaesthetic  exegetic  phrenetic  arithmetic  diabetic  alphabetic  diuretic  photosynthetic  prosthetic  unsympathetic  cybernetic  dietetic  geodetic  splenetic  nonathletic  unesthetic  copacetic  antipathetic  apologetic  parasympathetic  phylogenetic  ferromagnetic  geomagnetic  ontogenetic  nonmagnetic  psychokinetic  antidiuretic  paramagnetic  peripatetic  unapologetic  telekinetic  pharmacokinetic  onomatopoetic  electromagnetic  Words that almost rhyme with synthetic
medic  paramedic  ferric  septic  hectic  sceptic  authentic  endemic  metric  relic  aseptic  centric  peptic  eutectic  phrenic  skeptic  steric  derrick  inauthentic  pectic  systemic  eccentric  majestic  pelvic  symmetric  angelic  eclectic  forensic  ischemic  numeric  cleric  enteric  splenic  technic  allelic  benthic  chimeric  hysteric  acerbic  anorectic  lovesick  irenic  unauthentic  domestic  electric  generic  antiseptic  asymmetric  concentric  epistemic  esoteric  schizophrenic  isometric  obstetric  polemic  eugenic  isomeric  pandemic  totemic  turmeric  anorexic  dyspeptic  evangelic  leukaemic  thermometric  redbrick  dyslectic  academic  atmospheric  epidemic  dialectic  dielectric  geometric  antigenic  epileptic  mesenteric  pathogenic  econometric  psychometric  transgenic  biogenic  egocentric  ethnocentric  monomeric  neurogenic  neuroleptic  photometric  psychedelic  psychogenic  pyogenic  tartaric  dyslexic  geocentric  geodesic  ionospheric  neurasthenic  allergenic  photogenic  diametric  paregoric  callisthenic  parametric  volumetric  barometric  colorimetric  cryogenic  isoelectric  mutagenic  alphanumeric  androgenic  apoplectic  heliocentric  cataleptic  calisthenic  hypoallergenic  narcoleptic  nonelectric  telegenic  cliometric  carcinogenic  photoelectric  anthropogenic  iatrogenic  teratogenic  nonacademic  radiometric  paraplegic  polytechnic  pyrotechnic  hydroelectric  nonparametric  piezoelectric  stoichiometric  trigonometric  anthropocentric  hallucinogenic