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