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.
quipus quippus quips kips cups coups coupes coypus cuppas copious coypous guppies
quipus pus quippus quips lips lupous lupus nipas kips opus pupus pips rips sips zips dipso tips whips chips yipes pappus coypus coypous pups gipsy gips hips puss pious mips copious nips pipes pappous ripes sipes spues dips tipis tipsy wipes ships yips
quip quippu quippy quipu equip