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.
baryta baryte boart barite barret beretta biretta brut brat bard bort brit birretta berretta barrette board borty britt barde beret bared brute beard buret bruit barred berate borate bratty bready bright broody burette burrito
baryta rhyta rota aorta aortae baryte errata kurta pruta sorta torta yurta
bar bare barre barrio barrow bear boar bray bury bayberry kbar