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.
guess gauss gussy gussie cuss guys goes kues gaes cues kusso gassy queys cusso gauze quass guise queues cuisse kousso queasy gas gos quassia coss goas kaes keas keys kiss koss gays goos goys gaze
guess ess fussy fuss fesse fess buss gussy hues kues quass lues loess messy mousse mussy ness pussy rues sues dues wussy queys gesso hussy less jesse cues cuss cusso gauss kousso jess kusso queues louies mess moues muss gneiss puss roues cess suss wuss chess