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