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.
bobs boobs bubs bibs booboos boubous boobies bobbies babas babes bibbs babus bubus booboisie baboos bubbas buboes babies babassu baubees bawbees beebees bubbies
bobs boobs fobs hobs jobs cobs gobs kobs lobs mobs knobs nobs robs sobs yobs