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.
aminity amenity amanita ambient amniote ament ammonite ammoniate amount amend
aminity feminity minty amenity humanity immunity community
amin amain amine amino ammine ammino amnia amnio