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.
hillocked holked hulked hellkite hellcat helicoid
blocked clocked hillocked shylocked flocked locked relocked shellacked cloaked slicked lacked rollicked blacked flicked clucked locket flecked looked flacked plucked licked relooked lucked slacked clacked talcked clicked locoed