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.
titis tits titties toits tuttis teiids tidies tuts dits tots deities tats tets dites totes toots tides tates ditas touts teats doits tutus duits tauts ditsy dattos dittos didies duties tootsy tutees todies teddies toddies tatties tedious dawties toadies dauties tattoos ditties tutties tatouays ditz dots tads teds tods
mitis titis zitis tis its hits etuis kits beauties footies bidis gaits bawties knits jetties bits raitas gites ties coitus quiets reties hotties boites potties fiats catties rotis pitas metis kitties cooties pits shits chits duits wites whities situs waits tutties mitts titties patties tuis tatties litas ditties sties ditas dits mites deities dauties cutties quoits aits kites cuties bites laities poetise suites patois butties cities diets riots dawties booties bitts bitsy suits coatis quits fits satis nites jutties writes baits lits pieties writs sites nits ditsy betise putties fatties midis zits sits gaieties moieties gits pities cites rites dites doits duties cutis teiids tits toits tuttis whites whits wits chitties yetis
titi tit teiid tittie titty toit nitid pitied citied tidied toited