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.
subbreed sabred soubrette sabered sobered subarid sowbread seabird seaboard sobriety sybarite
breed subbreed rebreed bred gibbered showbread rebred tabored sabered fibered bared bored bread brede beebread lowbred sabred labored sowbread rebored sobered tabered rubbered shewbread jabbered yabbered