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