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.
grana gran guarana grain groan crania grainy granny grin grannie guarani crane garni krona grown green groin carina cranny groyne koruna greeny gurney garron corona curran carinae coronae greenie carn corn curn karn kern kirn
guarana purana pirana grana ran hariana guarani brawn frena furane groan murrain loran roan varna farina jarina buran crane gran borane reran saurian sierran drawn terrain train urania rain arena rani krona prawn parian marrano ruana crania brain corona furan curran marina fraena carina grain bran koruna pyran saran serrano drain durian terrane trona shoran