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.
richly rashly rachial rachilla racially rachillae racial retial
muchly richly tetchily schul shaly nuchal mushily lushly gushily gauchely cushily hatchel itchily fishily pitchily botchily bitchily shyly shily patchily poshly rashly bushily pushily satchel techily touchily
rich rechew rishi ruche arch archaea