Knief rhymes with:
naef, neef, aperitif, bas-relief, beef, belief, brief, chief, debrief, disbelief, fief, graef, graefe, graeff, grefe, greif, greiff, grief, hafif, keef, keefe, keeffe, kief, leaf, leif, lief, massif, matif, mccleaf, motif, naef, neef, o'keefe, o'keeffe, okeefe, okeeffe, reef, reif, reiff, relief, rief, saif, salif, seif, seife, sharif, sheaf, stief, thief, vancleef
Knief sounds like:
kamneva, kamp, kampa, kampe, kampf, kaneb, kanipe, kemp, kempa, kempe, kempf, kenaf, kimba, kimpo, kimwipe, knab, knabb, knabe, knape, knapp, knaub, knauf, knauff, knaup, knave, kneip, knepp, kniep, knife, knipe, knipp, knippa, knob, knobbe, knobby, knoff, knoop, knop, knope, knopf, knopp, knouff, knupp, kociemba, komaba, komp, konop, kumbaya, kump, kumpf, kunaev, kunayev