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.
bestows bests beasts besets besots basts beasties busts boasts boosts besides bastes bassets
stows bestows stews stoas stoss custos gustoes maestoso pestos pistous cestos xystos
bestow best beast beastie beset besot