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.
combo comb gombo coomb combe coombe coma come commy kombu comma gumbo comae caeoma cambia cumbia commie cam cum cwm goombah goombay came camo gamb
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