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.
gombo gumbo combo goombay comb goombah gamb gambe kombu gamba coomb combe coombe gambia gum gam coma come gama game gamy gaum
combo gombo womb tomboy duomo zombi romeo nomoi limbo ambo bamboo bimbo bomb bombe embow jumbo homo comb combe coomb coombe gumbo kombu mambo pomo sambo dumbo tomb umbo womby