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.
charmer chromier
armer farmer charmer warmer harmer creamery wormier termer barmier crammer dreamer germier primer framer lorimer former armor firmer rimer rammer creamier ormer dormer dreamier trimer roamer creamer wormer reamer
charm chirm chroma chrome chromo chromy