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.
valor valour velour valuer vealer vealier velar volar fluor flour floor viler flora faller florae floury veiler velure volery failure velaria flir
valor flora colour calory coaler haler velour healer valour fluor dealer vealer sailor dolor pylori tailor pallor taler malar whaler galore flour floor alar glory couloir clour color lory lour jailor bailor baler lore dialer sealer dolour realer talar pillory waler paler shoaler
vail vale valley value veal vealy vial oval ovally