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.
breeder birder border broider brooder broader braider boarder broodier broidery bordereau barter bruiter barrater barretor barretry bourtree brattier brighter bordure
breeder reader redder redear reedier herder greedier greeter tireder treader shredder shrewder
breed bred bared bored bread bready brede