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.
ditsy dits ditas ditzy duits dites diets doits dittos tits ditz deities ditties dots dawts deets doats didos dotes dates duets toits dauts datos titis duties tidies todies dattos diodes tootsy didies didoes doodies dowdies dawties teddies dauties tedious toadies titties toddies duteous daddies dads duds tads tats teds tets tods tots tuts
bitsy ditsy its tootsy whites duits tits footsy ditzy bits mitis hits gites gits coitus gaits fits kites quoits chits wites lits knits outsay pitas potsy riots ritzy quiets sites situs suits zits ditas dits writs fiats nits bites gutsy raitas mitts litas quits kits mites bitts daisy aits baits patsy nutsy rites writes pits boites wits whits waits toits titis doits nites cutesy dites diets zitis suites sits cites shits
dit deity diet dita dite ditto ditty doit duit adit edit dieted dittoed doited