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.
petsais ptosis patsies petasos petasus pitsaws potsies poetises poetesses poetizes poeticize ptoses putzes
petsais footsies ketosis matsahs mitosis outsays patsies pitsaws potsies ptosis stasis tatsois tootsies whatsis
petsai pets peats pietas pitsaw poets