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.
valour valor velour valuer flour velure floury vealer failure vealier volar floor velar fluor viler flora faller fleury florae flurry fouler veiler volery velaria
flour dolour lour valour velour clour colour bluer bailor loury valor floor allure gluer velure jailor lore blur lure couloir tailleur floury sailor pillory pallor valuer galore fluor calory pylori color glory dolor failure slur lory colure flora soilure tailor
vail vale valley value veal vealy vial oval ovally