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.
bibs bibbs bubs bobs boobs bubus babas babus babes bubbas baboos buboes babies booboos bawbees boubous baubees bobbies beebees babassu boobies bubbies booboisie
bibs fibs gibs jibs libs mibs nibs ribs sibs dibs