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.
goitres goiters goitrous guitars gaiters coutures kiters gaters gators guiders gutters cotters quoters cooters couters cottars coaters quatres quitters coteries quieters cottiers quittors cateress gauderies cadres coders caters codders cuatros cutters gadders gaydars kidders
litres nitres goitres titres mitres tres buttress dairies attires natures biters coutures futures baiters stores tress gaiters sutures nitros votress niters tries retirees retries citers satires sitars steres stress suiters tyres waitress kiters waiters metres treys trees trews matres tares tores matures viatores miters guitars titers liters quatres strews trues tires mattress goiters features poetries retires writers citrus sautoires stares loiters suitors shoetrees