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