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.
colza colas coalas cols coals class cools coils kolas claws cloze coles cowls clays coleus coulis koalas clause callas classy calesa colies collies colossi coolies coulees cullays coalesce coalless colessee coulisse
colza bolas violas colas kolas molas moolas plaza tolas chalaza cholas
col coly cowl coulee cooly coolly coolie cool colly coal collie cole cola coil coaly coala coyly