I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
sistra sister xyster zester zoster zestier
lustra rostra sistra ristra gaster astir costar nester boaster faster luster castor baster star juster wester quaestor toaster heister keyster zoster royster bister sutra fester moister rooster duster shyster waster tessitura diaster xyster maestro bistro sister meister roaster pastry rester buster bestir jester lustre ouster vaster ester poster bistre osetra satara piaster master leister wastry quester muster stir vestry zester feaster stray tester questor oyster maestri jouster nestor hoister paster laster keister kiester keester easter astray raster coaster diester wrester pester gastrea piastre straw ossetra pastor mister coster aster lister estray chaster roister roster stria rouster booster caster foster daystar taster waister yester