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.
puranic paranoic paranoiac prang prank parang purring pouring pureeing prong prink paring poring pairing parring peering preeing
puranic uranic pharaonic arnica barranca barranco boronic eirenic franc runic dornick phrenic ironic morainic moronic neuronic paranoic hydronic tyronic irenic tyrannic chronic
purana paranoea paranoia pirana prawn purin purine pyran spurn