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.
ducky duck dicky duckie dickey deck tuck dick duke dock dykey decay dikey tacky decoy dickie tackey dak dug doc dawk deco deke dike dyke tack tick
lucky ducky yucky chucky mucky sucky tackey fuck lackey jockey muck icky whacky quaky rocky hockey tuck suck tacky rickey dickey duck huck yeuky hickey pecky guck luck kicky cocky mickey puck picky jacky quick quacky dicky pocky quack pucka wacky caky buck bucko ruck coky chuck shuck yuck yukky