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.
vast vasty fast vest feast vista ghast visit vesta vestee fist fest phaseout facet feist foist fusty ghost vised
bast cast wast roast oast mast least last gast coast hast beast vast ghast feast fast east boast past toast yeast