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.
boobs bobs boobies booboos baboos booboisie bibs bubs bobbies boubous babes babas bibbs babus bubus babies bubbas buboes babassu baubees bawbees beebees bubbies
boobs jobs taboos sobas robes obes nobs mobs lobos kobs kobos gobs gobos cobs cobbs caboose hobs boos hobos fobs booboos bobs baboos lobes lobs knobs obas obis robs sobs yobs
boob boobie booboo booby bob bobby boubou baobab