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.
servo serve serf serif seraph sorgho survey surf
servo arvo bravo verve nerve nervy parvo perv serve wherve
ser sear seer sera serai sere serow serry sierra suer user