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.
pasture piastre posture paster pastor pastry pastier piaster pester poster pestier
vesture gesture pasture posture moisture suture tessiture stour bistre piastre stare stere gastrea stoure store lustre ossature strew bestrew restore austere wastrie
past pasta paste pastie pasty pst