Here's what rhymes with petrographic.
                        
                        
                    
                                graphic  traffic  geographic  telegraphic  biographic  demographic  ethnographic  bibliographic  pornographic  topographic  holographic  lithographic  typographic  calligraphic  photographic  stratigraphic  cartographic  orthographic  tomographic  stenographic  autobiographic  choreographic  phonographic  xerographic  radiographic  angiographic  iconographic  oceanographic  chromatographic  crystallographic  seismographic  cinematographic  lexicographic  electrocardiographic  electroencephalographic  Words that almost rhyme with petrographic
classic  thoracic  intrathoracic  neoclassic  psychopathic  osteopathic  magic  tragic  panic  pragmatic  erratic  lactic  manic  phallic  clastic  tannic  malefic  democratic  dramatic  organic  diplomatic  elastic  plastic  static  bureaucratic  fabric  ceramic  climatic  dogmatic  drastic  frantic  autocratic  catholic  mechanic  rheumatic  tactic  asthmatic  chromatic  galactic  galvanic  glutamic  thalamic  aplastic  italic  pelagic  syllabic  technocratic  theocratic  mastic  plutocratic  tyrannic  priapic  dynamic  romantic  aristocratic  gastric  hepatic  metallic  aromatic  emphatic  pancreatic  schematic  scholastic  somatic  thematic  traumatic  volcanic  barbaric  ecstatic  lymphatic  nomadic  oceanic  pneumatic  prostatic  sporadic  synaptic  aliphatic  cephalic  climactic  emblematic  fanatic  operatic  ophthalmic  presynaptic  prismatic  programmatic  spastic  achromatic  diagrammatic  heraldic  idiomatic  intrahepatic  magmatic  phlegmatic  satanic  titanic  acrobatic  epigrammatic  slapstick  ataxic  botanic  disyllabic  apparatchik  baldric  aerobatic  automatic  fantastic  gigantic  problematic  psychiatric  semantic  inorganic  monastic  charismatic  didactic  dynastic  enigmatic  hemorrhagic  inelastic  neoplastic  prophylactic  sarcastic  geriatric  kinematic  messianic  panoramic  paradigmatic  pedantic  tympanic  haemorrhagic  muriatic  spermatic  splanchnic  undemocratic  zygomatic  antidemocratic  bimetallic  bombastic  isobaric  orgiastic  schismatic  unromantic  astigmatic  intergalactic  panchromatic  periphrastic  polysyllabic  stigmatic  undramatic  matchstick  undiplomatic  unemphatic  nonelastic  systematic  symptomatic  cytoplasmic  enzymatic  hydrostatic  hypothalamic  metastatic  pediatric  stochastic  aerodynamic  axiomatic  cinematic  ecclesiastic  endoplasmic  melodramatic  monochromatic  nostalgic  transatlantic  anaphylactic  diaphragmatic  gymnastic  hyperplastic  hypoplastic  iconoclastic  orthostatic  protoplasmic  thermoplastic  viscoelastic  chiropractic  nonmetallic  paediatric  interscholastic  meritocratic  nondemocratic  sycophantic  thermostatic  nondramatic  asymptomatic  electrostatic  idiosyncratic  thermodynamic  hemodynamic  hydrodynamic  postsynaptic  psychodynamic  psychosomatic  monosyllabic  posttraumatic  unproblematic  numismatic  transoceanic  photostatic  enthusiastic  homeostatic  unsystematic  anticlimactic  semiautomatic  unidiomatic  homoeostatic  unenthusiastic  overenthusiastic