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.
crust crusty cruset curst crest corset crista cristae cresset cruised crusado crusade creosote caroused crosstie karst grist curiosity cariosity cursed coursed creased crossed cruzado goriest groused querist caressed grisette queerest crosshead cuirassed
rust trust crust jurist tryst arrest merest querist erst fairest first aurist forest frusta verset verste horste curst sheerest karst poorest burst prost purist rearrest serest sourest dearest direst drest tourist rest aorist worst rusty grist verist queerest barest crest roust frost crusty verst wrist horst hurst corset cruset wrest lyrist truest airest nearest prest purest rarest searest sorest surest diarist dourest durst trusty worset wurst yarest
cruse crus curse cars carse cors corse crass cress cris cressy crissa cross crosse crouse cruise curs ecrus