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.
crossly crassly grossly crousely curiously crissal crusily creosol coarsely carousel grassily carousal carrousel cresyl grisly cresol crazily greasily carcel coryzal grizzly
crossly grossly rosily brassily erosely furiously variously crassly curiously grassily morosely porously prissily prosily seriously dressily
cross crosse crass cress cressy crissa crouse crows gross across