Mightier rhymes with:
flightier, altier, carpentier, cartier, chartier, cloutier, cottier, courtier, dirtier, emptier, flightier, fortier, gautier, heartier, heftier, loftier, meatier, meteor, mintier, mortier, nastier, palmatier, parmentier, peltier, portier, potier, prettier, rustier, saltier, sportier, tastier, thriftier, trottier, whittier
Mightier sounds like:
maestra, maestri, maestro, magistro, manchester, master, mastery, mastro, maxtor, mcadory, mcateer, mccotter, mcteer, mctier, meester, megastore, meghdar, meister, mester, mestre, minister, ministry, minstar, minster, misater, mister, mistero, mistry, mixter, mixture, moisture, monastery, monster, mostar, moster, muenster, munster, musidora, musketeer, muster, mystere, mystery