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.
creosote crest crosstie creased cresset crossed caressed curst crust cariosity curiosity crosshead crista crusty cruset corset goriest greased grossed grisette queerest grist karst crazed cursed
creosote horste jarosite periostea prostie
cares cries acres cures crows crouse crosse cross crews caress cressy cress creese creasy crease cores across