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.
redonned redound reddened redenied retuned ratooned rattened retained retinued rattooned reattained retinite retint rident rodent
redonned donned stoned rattooned ratooned cottoned buttoned atoned toned tunned tinned tanned dunned downed dinned denned stunned
redon redone radon redan redeny