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.
cannon canon canine conin conine guanin guenon gunnen coniine guanine quinone
cannon pennon none nona neon canon guenon quinone noon ninon minion noun onion pinion rennin reunion xenon tenon wanion panino known munnion gunnen anon bunion fanion fanon phonon inion annona gonion ionone mannan anion pinon renown ronion tannin union chinone
canna cannie canny can cain cane canoe conn scan