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.
barrack bark braky brake brock barky brick barca baric bricky berake bork birk brag berk boric break broke brook burke barque birkie braggy baroque brookie
arrack barrack carrack rack wrack hayrack carack crack cracky rerack derrick track
barre barrio barrow bar bra brr