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