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.
whereat whereto wert whort wherried whored weirdie whirred wort wart weird wired warty wared waired warred weirdo weirdy worrit wearied
hereat whereat create derat aureate berate beret aerate ferret hereto reata great laureate reread cerate deaerate derate terret treaty terete treat whereto rat ret