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.
pustule pestle pistole pastille hypostyle pastel pastil pistil pistol postal postally
pustule bustle diastole wrestle rustle fistula pestle nestle castle stile stole stull style bastile stele stale eustele fistulae hostile hustle istle jostle justle misstyle hypostyle pistole restyle wrastle systole whistle