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.
teopans taipans tiepins deepens depones deepness dopiness dopeyness doupionis douppionis
teopans pans pains taipans panes pansy pawns peans pians kneepans japans copens opens papains reopens spans spawns speans chopins