Tyrannical rhymes with:
botanical, electromechanical, mechanical, puritanical, barnicle, botanical, chronicle, conical, cynical, ecumenical, electromechanical, ethnical, galenical, grossnickle, ironical, mechanical, monical, nontechnical, preclinical, puritanical, rabbinical, senecal, senechal, technical
Tyrannical sounds like:
tranquil, transsexual, trenkle, triangle, tringali, trinkle