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.
deet diet deed duet deedy deity dot dit tet dawt doit teed duty dita doty dote teat tide doat dead died daut date data dato dude duit dite datto didie diode ditto ditty dotty tutee
beet feet keet leet meet deet weet sheet et