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.
canton canteen cantina contain continua continue continuo condign condone kinetin quintin conidian guanidin quintain
ponton canton wonton wanton syntony downtown lenten panettoni panettone muntin monotony monotone quintin pontoon intown quintan phenytoin niton newton suntan dentin tendon intone
cant canto canty candy caned canid canned cannot canoed conte conto cunt scandia scanned scant scanty