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