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