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.
pastis pasties pasts pastas pastes posties posts pests pistes posits piosities paucities pestos pistous possets passades passados passadoes pussytoes poussettes pseuds pesades pesetas posadas pseudos
pastis testis xystus missets feists cestus busts lasts justs mosts rousts kists fasciitis fasts guests reests hists mists fiestas vests geests vistas hostas jassids pests cossets besots nasties beasties azotise heists bassets joists basts boasts lists gusts ousts cistus siestas testes deists cestas pastes wasts roosts waists resids posts pistes whists chastise shists tests xystos foists coasts wrists rests tassets niceties rusts zitis beasts maists cuestas vasts gaseities possets castes mysids paucities bastes gests besets sits hosts satis hoists pastas hests assets fests resets jousts feasts leasts gists casts zests fists sets vestas cists lusts gestes visits quests russets jests musts easts caestus sots piosities bests hygieists costs sties fascitis boosts tastes custos nests cecities ghosts raucities keysets gasts hastes roasts gussets cosets masts dusts cities knessets pasts posties rosets posits xysts cysts cestos resits societies wastes toasts wrests pestos pasties oasts wests wists chests hygeists yeasts
past paste pastie pasty pasta pst postie post pistou pesty paused pesto pest passed passado passade psst piste