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