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.
sunnily snail sonly sanely senile zanily snell snool xenial zonally
bonnily sunnily cannily funnily tinnily loonily unnail noily biennial phonily zanily punily nonoily tawnily tinily moonily rainily shinily nil