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.
kob kobo gob kab cob cobb gobo goby kibe cobia kibbe kibbi kibei cobby cowboy kebbie kibbeh