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.
bready bread brad bred braid breed beard broad brede bored bared birred burred bratty broody barred byroad buried berried beretta biretta bird bard brat burd berretta birretta bride board brute brood barde buret beret borty boride borate barite burdie barret birdie berate baryta baryte hybrid burette barrette bourride
bready ready tread dread perdy pardy oread nerdy lardy greedy hardy heard faraday bread beard reedy readd read reread tardy treaty
bra bare bear bora bore brae braw bray bree brew brie bura bureau byre rebar