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