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.
kusso kousso cusso cuss kiss koss kues gauss quass kissy guess gussy cuisse gussie kas kos kis quassia keas keys cues koas kois guys kaes kaas kays coss
cusso kousso kusso wuss pussy mussy mousse basso buss fuss fussy hussy gesso cuss lasso mosso gauss muss guess puss gussy suss quass wussy