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.
vail veal viol veil fail vill vial vile vale villi value voile vealy villa voila faille valley villae fil foal vela feal file fill fila foil filo fall vole fille fillo filly phial viola
ail bail fail vail hail jail kail quail mail nail pail rail sail tail wail al