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.
phonily phonal phenol phenyl funnily venially finely finial vainly venial finally vanilla venally
phonily moonily loonily only rainily tinnily punily tawnily onlay sunnily sonly lonely nonoily cannily funnily bonnily noily zanily tinily shinily nil
phon phone phoney phono phony aphonia