Here's what rhymes with photosynthetical.
heretical theoretical poetical hermetical antithetical arithmetical exegetical parenthetical alphabetical Words that almost rhyme with photosynthetical
biomedical helical vesicle vesical spherical metrical testicle technical identical hysterical lexical symmetrical indelible unethical hemispherical angelical electrical evangelical asymmetrical imperceptible nonsensical obstetrical unsymmetrical dialectical geometrical ecumenical academical nontechnical diametrical nonidentical infinitesimal petrochemical extendible nonelectrical trigonometrical pyrotechnical electrochemical incomprehensible