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.
breeds breads bredes bards brads birds burds burettes beards brides bardes boards berets braids broods brutes burets barrettes broads birdies borates barytes byroads burdies borides barrets hybrids barites berates berettas birettas brits bruts brats borts bourrides berrettas birrettas boarts britts bruits barytas brights brattice burritos
reeds creeds breeds jereeds greeds jerreeds rereads haeredes redes reds reads dreads oreads teredos nerds creds sherds treads uredos redos aretes redds herds marrieds greets nereids reredos breads heredes bredes credos parietes shreds
breed bared beret beretta biretta bored bread bready bred brede buret burette beebread