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