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