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