Ninefold rhymes with:
penfold, sevenfold, tenfold, billfold, blindfold, centerfold, eightfold, fivefold, manifold, penfold, saffold, sevenfold, sixfold, tenfold, threefold
Ninefold sounds like:
nameplate, neblett, neuenfeldt, neufeld, newbold, newfield, nibbled, niblett, nobility, noblet, noblett, noblitt, novelty