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.
cause causey case cuisse casa cuss cues cays caws cosey cusso gauze guise gauss cosie cassia gawsie gussie gas kas cos gaes koas keas goas kaes kaas guys gaze gays coss coys cows cosy coos kays kues
pause cause use miaous chaise paise pase vaus liaise gauze causey lase fusee house case vase chouse hawse luaus phase fuse raise reuse ruse cease souse tasse tawse touse chasse paseo passe pease mouse mousse fease ease bouse base beaus nausea gauss guise asea rase mousey masse rouse wrasse sauce douse taus tease louse muse lease chase chiaus youse