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.
brat berate bratty borate bort brit brad brut bread beret boart bruit brute braid britt borty buret broad barret baryta bready baryte bright byroad barite beretta biretta burette burrito berretta bard bred burd birretta bird barrette barde board bored brede breed bride brood bared beard
rat brat frat jurat carat grat karat korat prat derat drat