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.
kombu comb combe combo coomb gombo coombe goombah goombay coma come gamb kame kami
kombu bomb bombe imbue comb combe combo coomb coombe gombo zombi tomb womb womby