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.
gran groan grana grain granny grainy grin grannie guarana guarani garni crane groin grown green greeny gurney cranny curran groyne garron crania greenie carn curn kirn karn kern corn carny kroon corny croon cairn crone krone cornu krona kerne crony korun crown quern
ran bran buran furan curran gran loran pyran reran saran sierran shoran