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.
disci dis dice duci dies dais diss dicey deice daisy dioecy tis dos deys does ties daws duce doss dose duos dows dews dues days dahs dees dace tuis