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