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.
hempy hemp humpy hempie hump
hempy jumpy wimpy tempi temp dumpy remap lumpy kemp campy jimpy mopy gimpy humpy hemp vampy bumpy tempo champy