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.
flivver fluffier flavor flavory flavour fluffer flavoury vilifier valvar vulvar
flivver liever liver livery livier believer reliever silver sliver deliver delivery