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.
hyphal phial phalli ghyll phyla phyle phylae phyllo
hyphal pal sheal shaul shall wheal pial peal pawl paly pall pale heal pail haul halo hall hale hail phial whale shale shaly shawl shoal