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.
grainy grain granny grin gran groin grana groan cranny gurney cairny greeny grannie guarana guarani corny garni crony carny grown green crane cairn curran garron carina groyne crania carney koruny carinae carrion greenie
rainy brainy grainy shairn tranny terrain deraign murrain granny carny cairny cairn briony briny branny cranny brain brawny barny moraine bairn sarin arraign drain airn train rain tyranny grain sharny