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.
failure filaree fluor flair flare flour filar filariae filer fleury filler valuer floury faller velure flurry valour filaria flir floor fleer flier valor viler velour vealer feller florae fuller fueler fowler feeler veiler foliar fouler foolery fueller fullery vealier
failure soilure lure allure velure colure