Coastal's rhymes with:
postal's, bristol's, costales, crystal's, crystals, hostels, kristol's, pedestals, pistols, postal's, westall's
Coastal's sounds like:
cadillac, cadillac's, cadillacs, castellucci, castelluccio, castilleja, castle's, castles, catalog, catalogs, catalogue, catalogues, catalyze, catholic, catholics, catlike, catolica, cattolica, catwalk, citadel's, coattails, cocktails, codelco, costales, costello's, cutlass, cytology