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.
sweats swats sweets swots sweeties swedes seaweeds
wheats sweats waits wats watts weets wets whats whets awaits rewets swats sweets twats tweets
sweaty sweat sawed seaweed sewed sowed swat swede sweet sweetie