Fallback rhymes with:
fullback, prickleback, pullback, rollback, auerback, biofeedback, boback, brownback, brumback, buyback, comeback, cornerback, cutback, drawback, feeback, feedback, fishback, flashback, fosback, fullback, giveback, greenback, halfback, hanback, hardback, hatchback, hibaaq, hoback, hollenback, holsomback, holsonback, hornback, horseback, humpback, hunchback, kickback, leaseback, leatherback, lineback, louderback, netback, outback, paperback, payback, piggyback, playback, prickleback, pullback, quarterback, railsback, razorback, roback, rollback, ruback, ryback, setback, slayback, stainback, stanback, steinback, stoneback, talkback, throwback, wingback
Fallback sounds like:
felps, filipek, filipiak, filipkowski, filipovic, filipowicz, filipski, filofax, flapjack, flapjacks, flaps, flavius, flips, flops, flubs, fluffs, fullback, fullbacks