Nast's rhymes with:
blasts, castes, casts, fasts, forecasts, lambastes, last's, lasts, masts, pasts
Nast's sounds like:
nacogdoches, nasdaq, nasdaq's, nastasi, naugatuck, necessitates, necessities, neckties, negates, negotiates, nest-egg, nests, newscasts, newsday's, next's, niceties, night's, nighthawk, nighthawks, nights, nights', nonjets, nonstick, nugget's, nuggets