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.
waffie waff waive waif wave wife wive wavey weave whiff wifey
waffie fie taffia maffia toffee ruffe roofie raffia pouffe piaffe coiffe buffi coffee bouffe five fife fief feoffee gaffe