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.
pastil pastille pastel pistil pestle pistol postal pistole pustule postally hypostyle
pastil distil pistil testily gustily vestal mousetail moistly hustle jostle hostel hastily sootily hostile ghostly dustily chestily justly nastily lustily pastel lastly pistol rustily wrastle zestily costly coastal pestle castle stile feistily distal vastly mostly istle justle still bastile beastly hostly costal bustle nestle mustily mistily ghastly listel festal fustily postal rustle wrestle distill tastily whistle yeastily
past paste pastie pasty pasta pst postie post pistou pesty paused pesto pest passed passado passade psst piste