Karls rhymes with:
carl's, carles, carls, karl's, carl's, carles, carls, charles, charles', charls, chas, gnarls, karl's, sarles, snarls
Karls sounds like:
karels, karl's, karlik, korologos, kralicek, kralik, krolak, krolczyk, krolick, krolikowski, krulwich, kurlak