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.
dittos dattos dits ditties doits dites duits diets didos datos ditas ditsy didoes diodes duteous titties tattoos deities tedious ditz tets tods tats tots dots tits tuts tatouays toots dates touts duets tates dodos ditzy tauts totes dados teats titis dotes doats deets tutus dawts dauts toits toads dadoes todies dodoes tuttis todays tutees tidies tootsy duties didies dauties doodies tutties teddies toadies toddies dawties daddies doodoos dowdies tatties tootsie
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
ditto dittoed ditty dit edit dotted gitted doit fitted datto deity diet dita dite dotty adit vittate tittie kitted titty dieted bitted pitted doited duit witted