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