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.
colic colicky coeliac cowlick click calico clack klick clock cluck colog colloquia colugo clique gallic cloaca cliquy cliquey gallica killick cloacae kolacky collogue colloquy calk clag clog klik colleague
colic folic flic beylic aulic lick laic gallic maiolica killick melic plica rollick salic slick toluic flick phylic phallic heliac iliac calico click coeliac cowlick gallica klick malic oleic relic celiac silica telic sialic
col coly cowl coulee cooly coolly coolie cool colly coal collie cole cola coil coaly coala coyly