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