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.
agree agorae acre agar agger aggro agora agria augur augury
gree puggree agree pugree degree meagre chickaree pugaree decree ogre cicoree ocreae maigre ligure grue gore puggaree grey grew regrew maugre scree eagre figure shikaree