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.
maduros madras madres matures madrasa madders madeiras madrasah madrassa madrassah maters matres metros midairs matrass matters mudders mutters mattrass mattress moidores maderize meters metres mitres motors mudras miters meeters meteors metiers mooters
duros maduros dross duras dures durrs hydros hydrous odours pedros siddurs