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.
floury flour flurry fleury fluor flora floor valour florae velour fouler foolery fullery failure flir fleer valor filer flier flare filar flair filler velure fuller valuer fueler fowler feeler faller feller foliar volery filaree filaria fueller filariae phyllary
loury floury slurry lorry lory lour blurry fleury flour valour flurry velour calory clour colour glory pillory dolour
flu filo floe flooey flooie flow flue foul foully afoul