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