Kostka rhymes with:
garstka, pestka, butka, chykatka, ditka, dutka, garstka, kamchatka, kosmatka, latka, nitka, peroutka, pestka, sabatka, sitka, sobotka, winnetka
Kostka sounds like:
kaatz, kadish, kataoka, kate's, kates, kathy's, katja, kato's, kats, katsuhiko, katsushi, katyusha, katyushas, katz, kautz, keats, keatts, keds, keetch, keith's, keitz, ketch, ketchie, ketz, kid's, kiddies, kids, kids', kitagawa, kitch, kites, kitowski, kits, kitsch, kittiwake, kitts, kitz, kiyotaka, kodak, kodak's, kodiak, koetje, kokate's, koskotas, kostas, kostecki, kostek, kostic, kostick, kotas, kotch, kotecki, kotek, kotowski, kottke, kottwitz, kotz, kowitz, kudos, kudzu, kutch, kutsch, kutz, kuwait's, kuwaitis, kwiatek, kwiatkowski, kyd's