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.
pronto pronota pronate print parent preowned preunite perennate pernod pruned prawned preened paranoid pyranoid pyrenoid
pronto rondo arnotto aroint aroynt baronet front hereinto hereunto hornito coranto cornuto coronet couranto whereinto whereunto
prone pernio pirn porn porno porny prion prune pyrone apron