Here's what rhymes with nonantigenic.
antigenic pyogenic androgenic pathogenic splenic biogenic eugenic mutagenic neurogenic phrenic allergenic photogenic irenic telegenic transgenic anthropogenic cryogenic iatrogenic teratogenic hypoallergenic psychogenic neurasthenic schizophrenic carcinogenic calisthenic hallucinogenic callisthenic Words that almost rhyme with nonantigenic
epidemic polemic pandemic totemic pfennig academic endemic nonacademic systemic epistemic ischemic leukaemic technic benthic derrick genetic poetic authentic generic acetic diabetic pathetic pelvic angelic ascetic ferric relic peptic allelic eutectic steric dietetic geodesic geodetic medic fetich pectic domestic energetic kinetic prophetic athletic majestic metric esoteric forensic phonetic septic apathetic aseptic centric cleric enteric hectic emetic empathetic sceptic tartaric turmeric hermetic acerbic antithetic lovesick paregoric bathetic magnetic aesthetic sympathetic dialectic geometric symmetric antiseptic apologetic cosmetic epileptic esthetic mesenteric numeric alphabetic diuretic obstetric prosthetic frenetic isomeric monomeric ontogenetic psychedelic skeptic apoplectic chimeric dyspeptic hysteric antipathetic evangelic nonmagnetic paramedic paraplegic polytechnic pyrotechnic diametric gametic onomatopoetic parenthetic redbrick unaesthetic unapologetic unauthentic electric atmospheric synthetic anesthetic dielectric eccentric asymmetric concentric eclectic parametric anaesthetic isometric unsympathetic barometric cybernetic nonparametric photometric anorexic dyslexic geocentric inauthentic peripatetic anorectic homiletic splenetic exegetic nonathletic copacetic phrenetic dyslectic arithmetic phylogenetic antidiuretic egocentric geomagnetic kinesthetic neuroleptic paramagnetic alphanumeric anthropocentric ionospheric cataleptic thermometric narcoleptic telekinetic nonelectric unesthetic econometric parasympathetic psychometric biosynthetic colorimetric ethnocentric pharmacokinetic heliocentric radiometric psychokinetic cliometric volumetric photoelectric photosynthetic ferromagnetic isoelectric piezoelectric stoichiometric trigonometric hydroelectric electromagnetic