Marbut rhymes with:
garbutt, garbutt, orbit, abbot, abbott, cabot, celebate, celibate, garbutt, habit, halibut, hurlbut, hurlbutt, inhabit, inhibit, jackrabbit, kabat, kubat, nisbet, orbit, prohibit, rabbit, sherbet, talbot, talbott
Marbut sounds like:
marafat, marbod, marybeth, mirabito, morabito, morbid, morbidity, morphed, murveit