Kopetski rhymes with:
kopecky, kopecky, kopecky, bielecki, czarnecki, dolecki, gorecki, jarecki, kawecki, kopecky, kosmetsky, kostecki, kostelecky, kotecki, lasecki, piasecki, siedlecki, sobecki, solecki, sovyetsky, strzelecki, terlecki, touretzky, zaretsky
Kopetski sounds like:
kasputys, keypad's, keypads, kibbutz, kibodeaux, kovatch, kovats, kubitz, kvetch