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.
greeny green greenie granny gurney grainy careen gran grin carny grown groan grana grain crony groin garni corny cairny carney cranny garron groyne koruny coreign grannie guarana guarani
greeny boreen ferny careen green moreen preen terreen treen tureen
gree gore grew grey grue agree geekier ogre reeker reekier