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.
written rotten ratten ratteen ratton rattan ridden retene rattoon reattain redon rutin redan ratan retain retine radian rhyton redden retune ratany redeny retina ratine redone ratoon retinae retinue routine
kitten sitten mitten written litten bitten patten whiten batten fatten gittin ratten potteen gotten rotten quieten latten ratteen shotten ten