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