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.
duteous duties tedious dauties dates duets duits tutus dites dotes dudes dauts datos dattos dittos tutees ditties deities dawties tutties tots teds dits duds tuts dots tets tatouays deeds dawts totes tauts dodos deads ditsy toots touts tides ditas doats tates deets teats dados duads doits didos toits diets tootsy tuttis dadoes didies didoes dodoes diodes tidies todies teiids deduce dowdies tatties tattoos daddies deutzia titties toadies toddies doodies doodoos teddies
luteous beauteous piteous duteous touse buteos fatuous hideous gateaus riotous setous touts chateaus