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.
beard bard barde bread board bared bready barred brad burd bird bred berried bored breed beret braid brood broad boart brede barret byroad buried birred broody barite birdie baryta berate burdie baryte burred hybrid biretta beretta barrette berretta birretta bort brat brit brut
beard heard hared caird reread cared lardy guard laird fard cered fared bready hardy tardo liard farad heart hoard jeered hard sered sarod weird yaird sheered tiered shared shaird oared chared ward nard peart rared nerd tared pardy pard dared perdu feared eared bread bared herd board veered leered dread readd ready roared bard read queered garda lard card reared jerid arid geared seared barde merde peered soared oread pardi tardy neared perdy pared tread sard chard nerdy cheered shard teared sheared sherd wared yard
bear bar bare barre barrio barrow beer beery berry bewray bier boar kbar