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.
crusty crust cruset curst crest corset cariosity crista curiosity cresset crusade cristae cruised crusado creosote caroused crosstie grist karst cursed coursed creased crossed cruzado goriest groused querist caressed grisette queerest
rusty trusty crusty hurst wurst torosity varsity trust touristy durst porosity curst crust cruset cariosity frusta serosity frosty truest forestay burst wristy rust russety roust curiosity morosity frowsty christy
cruse crus curse cars carse cors corse crass cress cris cressy crissa cross crosse crouse cruise curs ecrus