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.
boys buoys bys bos beys bios buys boas bows boos bays boss bossy bousy byssi boozy bouse bowse boughs bus bes bas bis bowwows baas buss bass bees base bioassay bozo bias busy bise bassi basso bassy bazoo beaus booze
boys buoys foys hoys joys coys goys soys toys os