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.
coeliac colic cowlick colicky clack click colloquia cloaca kolacky cloacae clag colleague colog cluck clock klick cloak clique cliquy cloque colugo gallic cliquey gallica killick
heliac coeliac celiac beylic iliac lilac melic relic telic shellac lac