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.
proudly partly pertly portly protyl peartly predial protyle peridial praedial predella prettily portal prattle pretell
proudly rudely broadly broodily crudely lordly
proud prod parodoi parody pirouette prude sprout