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