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.
pengo pingo peeing pieing pang ping pong pung panga piing pinko hyping pooing hypoing pink punk
pengo eng hoeing gieing jeeing jingo congo congou geeing gaeing cooeeing lingo mongo being pingo seeing dingo teeing toeing queueing mungo hieing mongoe feeing bongo bingo cueing quango lanugo fungo mango kneeing peeing haeing nonego pieing renig dieing tango tieing shoeing
pen pean peen pein penna pennae penne penni pennia penny peon peony open