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