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.
pots pouts potsy poets pottos potsie pits puts pods pets pats potties poetess poetise patsy putts poods pates peats pitas pietas pittas patois pities petsai pitsaw pieties puttees poetize piteous patties putties pads peds puds putz padis pedes
boots cots shoots tots dots soots roots pots oots knots mots moots lots loots coots bots jots hots hoots phots foots riots rots sots toots wots shots