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.
faugh vugh fauve fava fave
faugh kiaugh waugh saugh laugh ugh quaigh toughy lough teugh agha vugh laigh cough pugh saughy sough sugh rough tough roughy
faugh fauve laugh saugh saughy waugh