Kopec rhymes with:
popek, popik, capek, chapek, daubenspeck, doverspike, endoscopic, epic, filipek, geotropic, gyroscopic, isotopic, knapik, kupek, laparoscopic, leppek, microscopic, monocarpic, myopic, nitpick, olympic, opic, paralympic, perpich, phenotypic, philanthropic, philippic, polycarpic, polytropic, popek, popick, popik, salopek, scopic, sepik, slupic, telescopic, topic, tropic
Kopec sounds like:
kabuki, kafka, kafka's, kafkaesque, kaposi, kaposi's, kappes, kappus, kaps, keeps, keepsake, keepsakes, kepco, kevex, kickback, kickbacks, kiev's, kippes, kishbaugh, kobak, kobayashi, kobe's, kobes, kobs, kobus, kobza, koepke, koop's, koops, kopacz, kopas, kopecky, kopek, kopeks, kopischke, kopka, kopke, kopko, koppes, kops, kovac, kovach, kovach's, kovacic, kovacich, kovacik, kovack, kovacs, kovaks, kovich, kubacki, kubas, kubes, kubiak, kubic, kubica, kubicek, kubick, kubicki, kubik, kubis, kubisiak, kupek, kupiec, kupka