Castoff rhymes with:
blastoff, blastoff, holzstoff, blastoff, cutoff, holzstoff, liftoff, tegethoff, aikoff, beloff, benninghoff, blastoff, bohnhoff, brinkerhoff, brockhoff, cargonoff, checkoff, cutoff, dolloff, drop-off, dropoff, duboff, eckhoff, eickhoff, falloff, federoff, friedhoff, fruehauf, hoelterhoff, holzstoff, imhoff, kafelnikov, kickoff, knockoff, kohlhoff, kolokoff, layoff, leadoff, lenhoff, liftoff, madoff, markoff, minkoff, neuhoff, olthoff, osterhoff, patricof, payoff, playoff, popoff, potthoff, puthoff, rakoff, ribicoff, ripoff, rockoff, romanoff, runoff, rykoff, saathoff, sadoff, satloff, selikoff, selloff, shernoff, shicoff, spinoff, standoff, steinhoff, stroganoff, takeoff, tarnoff, tartikoff, tegethoff, tipoff, tradeoff, turnoff, uphoff, vanderhoff, wemhoff, westerhoff, westhoff
Castoff sounds like:
cadby, catawba, causative, codify, cutoff