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