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.
samiels sawmills smells smiles sambals similes smileys seamless smalls sumless symbols symbolise symbolize cymols cymbals
samiels mils mels milos smiles pummels similes pomelos moils kummels camels camails gimels emails mewls mills mells meals mails pommels pummelos remails miles pumelos sawmills smells umbels