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.
nuclease nucleus knuckles nickles neckless knockless nicols nickels niggles necklace
nuclease clause coalesce galeas galleass queleas euclase vocalese coagulase legalese cyclase zoogleas zoogloeas declasse