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