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.
pignus piggins pekins pagans pigginess pokiness pawkiness pickiness pugginess pecans pekans packness paganise piquance piquancy pogonias
pignus hogans wigans waggons deigns segnos guns pagans muggins logans ligans leggins lagans coigns coignes cogons vegans conus feigns bogans biggins beignes agons logons noggins piggins reigns signs tigons wagons shoguns