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.
paranoid pyranoid pyrenoid pernod prawned parent pronto pruned preened pronota preowned preunite print
pyranoid paranoid serranoid ranid araneid coronoid crinoid muraenid pyrenoid serranid uranide
paranoea paranoia parian pirana prawn purana pyran