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.
guts gouts gutsy gats cuts gaits cutes goats gudes quits cutis gauds guids gates quiets cuteys quoits quotes guides cutesy cuties quotas cutesie quietus gateaus gaudies cutties goatees gads cuds kats kits cats qats gods cots gaieties kudos gowds quods kotos katas coots quids goods cates coats kudus kytes cotes kites quads goads gadis keets
beauts gouts shouts tuts tauts ruts puts outs nuts knouts muts mauts louts guts cuts bouts juts huts phuts ghauts buts pouts routs dauts touts uts shuts