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