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