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.
guiro grow guru gaur guar quire curio gurry gooier kouroi kir cur gar gor gore kuru grew kier grey crow coir gory curr cure gray gree keir grue goer
guiro biro burro euro vireo giro curio kouroi quire duro tiro chiro churro