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