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.
gabbard gabbart gabbroid cabaret keyboard cowbird
gabbard bard tabard debeard subarid seaboard rubboard reboard keyboard leeboard gabbart aboard board beard bared barde teaboard