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.
piteous pities pits pieties pouts pates pitas pietas pittas pitsaw pottos poetess potties putties paddies puttees patties pats peds pods pets pots puts puds padis poods potsy pedes patsy peats poets putts patois potsie poetise poetize
luteous beauteous piteous duteous touse buteos fatuous hideous gateaus riotous setous touts chateaus