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.
madrassa madrassah madrasa madrasah madras matrass madeiras mattrass mudras madres madders maduros mattress maters matres matters matures midairs mudders moidores maderize meters metres metros miters mitres motors
madrassa trass madrasa madrasah madrassah matrass mattrass strass