Witless rhymes with:
atlas, countless, cutlass, doubtless, ductless, effortless, flightless, fruitless, hartless, heartless, limitless, listless, meatless, meritless, pilotless, pointless, restless, rootless, spotless, tactless, tasteless, thoughtless, ticketless, warrantless, weightless
Witless sounds like:
wadleigh, waidelich, wattles, wedlock, weidlich, whitehall's, whitelock, whitlock, whittle's, whittlesey, woodlock