Mcmaster rhymes with:
macmaster, macmaster, macmaster, grandmaster, headmaster, macmaster, master, aster, astor, blaster, caster, castor, disaster, faster, gaster, grandmaster, headmaster, jaster, kaster, laster, macmaster, master, oleaster, paster, pastor, pasztor, pilaster, plaster, raster
Mcmaster sounds like:
macmaster, mckinstry, misconstrue