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.
sawmills samiels smalls smells smiles sambals similes smileys seamless sumless symbols symbolise cymols
sawmills mills mils miles smells milles similes maills mails malls mells moils molls mulls emails camails remails samiels milos smalls smiles