Massif rhymes with:
seif, seife, aperitif, bas-relief, beef, belief, brief, chief, debrief, disbelief, fief, graef, graefe, graeff, grefe, greif, greiff, grief, hafif, keef, keefe, keeffe, kief, knief, leaf, leif, lief, 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
Massif sounds like:
maccabee, macphee, macvie, magby, magpie, makeup, mancebo, mangope, manship, massive, mcabee, mcafee, mcaffee, mcavoy, mcbay, mcbee, mccabe, mccuvey, mcevoy, mcfee, mcgaffey, mcgoff, mcguffee, mcguffey, mcguffie, mchaffie, mcphee, mcphie, mcvay, mcvea, mcvey, mcvoy, mesaba, mikva, minkoff, minskoff, misbehave, mischief, misgive, mishap, mississippi, missive, mixup, mockby, mogopa, mojave, mosby, mugabe, musavi, muskopf