Mccombs rhymes with:
calms, com's, coms, balms, bomb's, bombs, brahms, calms, cdroms, com's, coms, dahms, guam's, hommes, homs, islam's, mom's, moms, palms, pogroms, proms, qualms, rom's, roms, suddam's, thoms, tom's, toms, vietnam's, yom's
Mccombs sounds like:
magnavox, magnifies, mozambique, muckenfuss