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.
punitory pantry punter painter pandoor pandora pandore pointer pounder paintier pointier pander pinder ponder
vanitory monitory punitory nitery genitor gyniatry janitor minatory monitor sanitary unitary wintry