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.
beacon bacon beckon began begone begonia begun bogan bagnio beigne bygone beguine buckeen
bacon macon beacon deacon racon con acne wagon neocon coin beckon recon agon reckon conn racoon coon cony cocoon kaon recoin coni scone cone tycoon icon weakon
back beak beaky beck abaca aback