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.
pottos pots potties potsy putts poets pouts poods pittas patois potsie poetess putties poetise puttees patties puts pods pets pits pats pitas peats pates patsy petsai pietas pities pitsaw pieties piteous poetize
ghettos ottos pottos dittos mottos dattos lottos taos mottoes tattoos tots bitts netts jatos mattes motts lyttas kotos fouettes tits setose tuttis ratos rotos kowtows setts stoss suttas buteos fyttes toes bettas vetoes mitts batts shotts ghettoes chotts kotows riotous toys botts tats tods tows photos cottas mottes mutts ketose lattes autos tets tuts watts pittas putts buttes rottes setous stoas stows datos patois lotos matts butts lottes toss yetts
potty potto pot pouty spot pout putto poet putti puttee putt petty pitta petto petti patty pattie pattee puttie putty spotty