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