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.
rubasse rubace rubs rubus rubes rubies ribose rubious rubbies rebs ribs robs robes rebus ribes rabbis rabies rebbes rebuys rabbies
rubasse base bass bassi basso bassy abase babassu subbase subbass debase diabase bas