Koff rhymes with:
bake-off, jerk-off, scoff, skoff, bake-off, boff, christophe, croff, doff, goff, gough, groff, hauf, hauff, hoff, jerk-off, knauf, knauff, knoff, lauf, mcgoff, off, poff, prof., roff, schoff, schroff, scoff, shoff, shroff, skoff, stauff, stoff, trough
Koff sounds like:
kabbah, kabi, kaifu, kapp, kappa, kashuba, kassab, kaszuba, kaufhof, kaup, kaupp, kauppi, kayapo, kazikaev, kcop, keef, keefe, keeffe, keep, kepp, khufu, kibbe, kibbee, kibbey, kibby, kibeho, kickoff, kief, kiev, kiff, kip, kipp, kivi, koba, kobe, koby, koep, koepp, koeppe, kofi, kofu, koob, koop, kope, kopf, kopp, koppe, kopy, kosbie, kosecoff, kosiba, kosovo, kosub, kosyakov, kouba, kozub, kuba, kube, kubo, kuby