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.
horny horn hern heron herein hereon hernia heroin hariana herniae heroine
horny corny porny sharny loran korun sorn moron irony porno mourn tourney shorn crony journey corn browny cornu carny cairny morn horn lorn briony barony ferny koruny gurney briny barny bourn boron born barney carney porn borne torn worn shoran yourn
hoar hoary hoer hoorah hooray hora horah hour houri