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.
xystus xysts xystos cysts cestus cistus cists zests cestas cestos siestas suicides zoisites
caestus cistus xystus cestus dusts cestas cuestas gists vestas coasts pastes roasts boasts hests fests resits busts gasts gestes wists feasts hosts testis boosts suds joists lusts mists foists acetous sots visits gussets ghosts cossets shists wests toasts tastes zests wrests xysts russets siestas fasts reests pistous pasts ousts musts masts possets fists hygieists justs pests castes nests situs keysets hastes quests hoists leasts wastes sits assets easts tassets bastes jousts beasts hostas guests rusts hists casts basts mosts tests feists costs missets besets vests fiestas posits setous bests sets vistas roosts gests kists jests pastas rosets heists chests custos xystos wasts gusts besots lists knessets pestos hygeists resets lasts maists vasts cysts bassets pistes whists posts rests rousts wrists cestos cosets geests cists oasts pastis deists testes waists yeasts