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.
peg peag pug pec pig pike poke peke peck peak peek puke peaky pecky pekoe piggy pique pokey puggy piggie