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