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