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.
wheaten whiten widen witan wooden
beaten eaten wheaten neaten deaden leaden tauten zeatin retene patten paten oaten latten sateen lateen quieten ketene catena fatten batten ratten laten ten
wheat what whet sweat sweaty wat wet