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.
bullyboy bellboy bulb bilbo balboa bilboa blab bleb blob blub bilby blabby blebby blowby
bullyboy flyboy bellboy flyby callboy playboy tallboy
bully bull bally belly billy boulle bulla bullae