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.
pipit pipet pipette piped pipped poppet pupate puppet paupiette
pipit pit pita pity capita lipid pipet sopite spait spit spite dipt uppity wapiti whipt