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