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.
boos bos bios boas boys boss bows bozo bowwows buoys bouse booze bousy bazoo bowse boozy bossy boughs bys bis bus bes bas base bise buys beys buss bias baas bass bees bays bioassay busy bassi basso bassy beaus byssi
boos coos goos loos moos poos zoos woos shoos os
boo boob boobie booboo booby bo