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.
maigre maugre meagre macro makar maker micro megara muggar mugger muggur muckier muggier
maigre eagre squire rigor regrew puggree ogre meagre maugre ligure vigor figure agree gore quire grue grey grew gree pugree require cigar degree
mag mig maguey migg amiga amigo imago