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.
colour clour color colure couloir calory collar coaler coiler cooler calorie coalier collier colliery collyria clary clear glory gluer caller culler galore gaoler gloria gluier
flour dolour lour valour velour clour colour bluer bailor loury valor floor allure gluer velure jailor lore blur lure couloir tailleur floury sailor pillory pallor valuer galore fluor calory pylori color glory dolor failure slur lory colure flora soilure tailor
col calo coyly coulee cloy coal coala coaly coil cola cole collie colly coly cool coolie coolly cooly cowl kolo