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.
lefts lefties lifts lofts levities lights lovats
efts lefts wefts hefts fetes befits haffets refits softs soffits buffets civets rifts vets shafts duvets tufts naivetes caveats lofts haffits fits tofts foetus fats covets gifts fets fetas muftis softas sifts rivets revets rafts fetus lifts whiffets defats feats hafts soviets defeats taffetas tuffets wafts shifts
left lefty leafed lift loft lofty cleft