Klasen rhymes with:
clasen, clasen, leysen, basin, caisson, capsaicin, cayson, chaisson, chasen, chasten, clasen, freemason, grayson, gustaveson, hasten, jason, leysen, mason, salveson, spleisson
Klasen sounds like:
kalugin, kaluzny, keelson, kellison, kelson, kilcoin, kilcoyne, klaassen, klassen, klejna, klesken, kligman, klugman, klusman