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