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.
lowbred labored laboured labret labroid librate laborite leeboard liberate libretti libretto liberty
lowbred bred showbread tabored subbreed sobered sabered rebreed rebred rebored labored cowbird jabbered gibbered fibered beebread breed brede bread bored bared rubbered sabred sowbread tabered shewbread yabbered