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