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