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.
bast boast baste beast basset bust best bassett beastie based boost beset besot busty bestow biased basidia biassed bused
bast cast wast roast oast mast least last gast coast hast beast vast ghast feast fast east boast past toast yeast
bas base bass bassi basso bassy