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.
couters coaters cotters cooters cutters coutures cottiers coteries caters coders cauteries codders quoters goiters cottars gutters quieters cateress quitters catteries cauterize kiters gaters guitars quatres goitres gaiters guiders catarrhs gauderies cadres gators cuatros gadders kidders
couters souters shouters pouters neuters outers touters routers liters jotters kiters butters getters quoters metiers vetoers peters baiters boaters shatters putters quieters hatters tiers oaters terse ritters potters loiters citers tears setters totters biters batters natters lotters hauteurs hooters sutras dieters shutters daughters whitters wheatears waters utters tutors fitters toters titters tetters tatters dotters steres cooters cheaters cottiers pewters cotters powters voters pitiers jitters quitters coaters petters heaters gaiters miters shooters betters ratters niters gutters puttiers litters haters titers mooters gaters letters retears knotters eaters otters goiters sitters reutters knitters meeters patters maters auteurs raters rooters cutters nutters looters beaters heteros tooters matters paters meteors suiters netters fetters footers caters mutters hitters vetters noters writers rioters lauders steers seaters meters deters daters doters taters teeters rotters tuateras uterus waiters wetters whetters chatters chitters sheeters bitters yatters
couter cautery coater cooter coterie cotter couture cuter cutter acuter coquetry scoter scouter