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.
buoys buys boys bys bus bos boas boss bows buss bays beys boos busy bios bossy bowse boozy bousy beaus byssi bouse boughs bas bowwows bis bes bioassay bass bees bias bise bozo buzz baas base
buoys joys duos buys foys hooeys hoys joeys boys coys cooeys goys guys quays queys looeys soys toys