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.
petsai pets poets peats potsie pietas pitsaw poetize pieties poetise poetess pats pots pits peds puts pitas pouts pates pedes potsy patsy putts patois pities pottos pittas paddies patties piteous potties puttees putties
petsai footsie matsah outsaw outsay pitsaw potsie tatsoi tootsie
pet peat peaty petti petto petty pieta piety poet