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.
affaires affairs afars affrays aviaries aivers avarice avers averse
affaires vireos chivaries rivieres ovaries fairs fares fires vairs varies fairies affairs vires aviaries vivaries caviares covaries kafirs livres refires chivarees shivarees