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