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.
bass bassy bassi basso bas boas baas buss base bias bays boss bioassay byssi bossy beaus bes bys bus bos bis beys buys boos bees bise bows busy bios boys baiza baize bazoo bouse bousy bowse buoys
ass bass quass lass mass pass sass tass as