Napped rhymes with:
snapped, adapt, apt, capped, clapped, entrapped, flapped, lapped, mapped, rapped, rapt, recapped, sapped, scrapped, slapped, snapped, strapped, tapped, trapped, untapped, unwrapped, wrapped, zapped
Napped sounds like:
nabbed, nafta, naivete, naphtha, neft, neophyte, nevada, nevitt, nifty, niobite, nipped, nobody, nobody'd, nobuto, nonfat, nonfood, novato, numbed