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.
hysteroid steroid stereoed stroud strode stride steered strati sturdy strait stored stared striata stirred stretto satyrid starred stretti storied sutured seatrout stearate start strut sturt
hysteroid steroid toroid meteoroid deuteride trod
hysteria mystery oyster xyster shyster yester