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.
ocrea ocreae ogre okra ocker
ocrea bigarreau decare sucre screw score sacra core craw crew cure acre care fiacre buckra lucre lycra micra nacre ocreae picara scare scree secure daycare decree