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.
cloudily coldly colloidally colloidal gladly clitella gladiola gladioli guiltily keloidal
cloudily loudly bloodily fluidly
cloud cloudy clod cloddy clout clued could