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.
beery beer berry bewray bray bury bier bree bear burry bro brr bar bourree bur bra boar brae buhr burr birr brrr brio brew biro bore bora boor brie broo bura braw brow bare byre
beery eery veery peery leery cheery cheero beer serry jerry perry ferry deer peer queuer deary very faery weer cheer leary sheer veer cherry queer deray fiery eyry herry merry berry aery query derry jeer kerry terry teary weary wherry leer seer sherry