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.
crammer creamer crimmer creamery creamier crummier crumber grammar grimmer grummer krimmer crumbier gramary grimier groomer
crammer rammer warmer drummer dreamer krimmer grimmer crummier creamier creamery creamer harmer framer farmer armer brimmer rummier rummer roamer rimmer reamer rammier crimmer grammar grummer primmer dreamier trimmer charmer
cram caramba crambe crambo cream creamy crummie crummy gramma gramme scram