Here's what rhymes with catatonic.
tonic ionic sonic conic platonic diatonic phonic bionic acetonic chronic ironic tectonic demonic iconic sardonic hypertonic isotonic laconic subsonic daemonic harmonic ultrasonic chorionic colonic mnemonic supersonic monotonic planktonic telephonic hydroponic monophonic avionic quadraphonic quadrophonic embryonic hegemonic diachronic ganglionic polyphonic symphonic electronic histrionic synchronic architectonic stereophonic infrasonic philharmonic pathognomonic microelectronic Words that almost rhyme with catatonic
atomic comic anatomic diatomic subatomic autonomic genomic ergonomic economic astronomic taxonomic agronomic gastronomic tragicomic uneconomic macroeconomic microeconomic socioeconomic topic atopic boric catabolic logic toxic folic gothic tropic anabolic biotic bardic diabolic subtopic hayrick rollick cosmic metabolic aortic apostolic aquatic chaotic erotic garlic biologic caloric catastrophic caustic despotic diastolic episodic geologic melodic carbolic hyperbolic idiotic isotopic parabolic phenolic pyloric anarchic basaltic dialogic formic frolic gnostic iambic karmic meiotic myopic robotic cirrhotic rhapsodic seraphic strophic allegoric chopstick carsick placekick historic symbolic alcoholic patriotic periodic antibiotic exotic hydraulic neurotic hypnotic isotropic narcotic pathologic psychotic systolic ascorbic metaphoric necrotic spasmodic agnostic anoxic cathartic cathodic euphoric fibrotic hypoxic lethargic meteoric nontoxic orthodontic pedagogic thrombotic antarctic bucolic demagogic acrostic ecologic heartsick workaholic subtropic shambolic chocoholic shopaholic astronautic chocaholic diagnostic philosophic cytotoxic neurologic prognostic anisotropic etiologic metamorphic psychologic semiotic symbiotic synoptic yardstick quixotic sclerotic telescopic folkloric hierarchic homoerotic vitriolic xenophobic gyroscopic subarctic sophomoric theosophic nonnarcotic gynaecologic horologic physiologic prehistoric histologic macroscopic endoscopic morphologic gynecologic hematologic melancholic oligarchic peristaltic polymorphic psychotropic arthroscopic kaleidoscopic unpatriotic macrobiotic posthypnotic aetiologic haematologic noncaloric seismologic microscopic hydrochloric philanthropic anthropomorphic atherosclerotic epidemiologic immunologic pharmacologic stereoscopic microcosmic antispasmodic misanthropic nonalcoholic stroboscopic meteorologic spectroscopic bacteriologic fluoroscopic submicroscopic electroscopic