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.
mast mayst maist must mist most moste musty moist misty misate miseat misset massed mustee mestee misseat missuit musette miscite missout maced mazed misdo mused mysid
bast cast wast roast oast mast least last gast coast hast beast vast ghast feast fast east boast past toast yeast
mas masa mass massa masse massy