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.
polyped polypod polypide polypody polypoid palped pulped plopped palpate pulpit pleopod
polyped galloped cheliped walloped dolloped sliped polypod aliped eloped filliped helped cleped loped gulped galoped kelped ycleped lolloped milleped milliped palped pulped sloped taliped whelped yelped