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