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