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