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.
wart warty wort wert ward wared whort waired warred worrit wearied whereat whereto word weird wired wordy
art boart fart hart heart cart kart quart mart part peart dart tart wart chart