Cref rhymes with:
greff, ref, reff, reph, streff, chef, clef, deaf, f, f., geoff, greff, hfdf, jeff, jeffe, leff, mcneff, neff, ref, reff, reph, rpf, sbf, scheff, seff, sheff, steffe, steph, streff, zeff
Cref sounds like:
carafe, carava, caraveo, carbo, carboy, carby, caribe, caribou, carob, carp, carpio, carriveau, carrubba, carve, carvey, cerf, cervi, charpie, cherub, chirp, chirpy, chorba, corbo, corbu, corby, corp, corrib, corriveau, corva, corvo, cosgriff, cosgrove, crab, crabb, crabbe, crabby, craib, crap, crapo, crappie, crappy, crave, cravey, creep, creepy, crepe, crepeau, crib, cribb, crip, cripe, croff, crop, cropp, croup, crupi, crybaby, cuervo, curb, curbow, curby, curfew, curve, curvy