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