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.
appel appeal appal apple apply appellee appall apollo
rappel appel chapel topple dapple supple spell speel ripple repel reapply popple nipple lapel cupel hopple apply fipple apple appeal appal pele peel peal repeal ripely ripply speil spiel supply tipple tupelo shapely