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