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.
womby womb whom whammy wame wham whim
womby combo womb tomboy doomy roomy mommy limby kombu goombay gombo coombe coomb commy bomb bombe comb homy homey foamy embay boomy lamby loamy pommy zombi tomb tommy combe