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.
jocko jock jockey jack joke joky jouk jokey jacky gecko jog geck jake jauk juco juke juku
jocko socko cock cocky coco cocoa coocoo cuckoo mock lock nock pocky gecko wacko chock shock jock rock bock rocky bucko bookoo boocoo loco knock pock poco hock sock hoick sicko dock whacko shacko yock