Whitefish rhymes with:
catfish, flatfish, angelfish, bottomfish, catfish, crawfish, cuttlefish, dealfish, dogfish, flatfish, goldfish, goosefish, guardfish, icefish, jellyfish, jewfish, lungfish, needlefish, pipefish, queenfish, redfish, sailfish, shellfish, starfish, sunfish, swordfish
Whitefish sounds like:
wedbush, whitbeck, witbeck, woodbeck