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.
cheshire chichier
shire cheshire dishier shrew washier dashier rushier mushier share shier shirr shore chirre seashore ashore beshrew bushier fishier cashier cushier gushier meshier pushier ashier