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.
pits pitas pities pittas pietas pitsaw pets puts pats pots piteous pieties pates potsy putts poets peats padis pouts patsy petsai pottos potsie patois paddies puttees poetise potties patties poetess putties pads peds pods puds putz pedes poods
aits quits chits whits toits duits dits suits writs pits nits knits lits quoits kits baits gaits gits its hits fits bits sits zits doits tits waits wits shits