Rustier rhymes with:
nastier, tastier, altier, carpentier, cartier, chartier, cloutier, cottier, courtier, dirtier, emptier, flightier, fortier, gautier, heartier, heftier, loftier, meatier, meteor, mightier, mintier, mortier, nastier, palmatier, parmentier, peltier, portier, potier, prettier, saltier, sportier, tastier, thriftier, trottier, whittier
Rustier sounds like:
racketeer, rakestraw, raster, rastetter, raxter, reactor, rector, rectory, regester, register, registrar, registry, reister, requester, resetar, rester, restore, restorer, richter, riester, riesterer, righter, rister, roaster, rochester, rocketry, roister, rooster, rossiter, roster, royster