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.
rocky rock rooky roc rickey reck rack rick ruck rook wrack reeky wreck rekey wrick rookie rec rake raki raku reek ryke
cocky rocky pocky chucky tokay whacky dock tackey socko dickey gooky rooky knock bock jock cookey joky chokey yock jocko caky icky jockey hickey okay mock picky lucky jacky hooky poky rock jokey nooky quacky mucky nock hokey kooky hookey oaky kicky coky cooky hock hoick lock hockey pokey pecky pock rickey mickey lackey cock sock sucky dicky ducky tacky wacky chock choky shock yucky