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