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.
cedulas cedillas sedulous citolas seidels stellas seedless setulose setulous steals steels steles stulls citoles settles
cedulas radulas doulas duals duels dulias dulls dulse cutlas medullas modules modulus nodules