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.
smiles similes smileys samiels sumless sawmills seamless smalls smells sambals symbols symbolise symbolize
miles smiles similes mailes mulleys emails fumeless mails beamless homilies milos males females loamless wimbles seamless maills tameless malleus molies mooleys mules mailless shambles gumboils umbles timeless sumless mallees foamless gemmules camails chimblies nameless limbless moils numbles ramilies remails rimless samiels ambles tombless fameless mills bumbles muleys muhlies mollies timbales mils rambles chimbleys milieus amoles smileys jumbles homeless families humbles milles nombles aimless moles mealies embolies tumbles fimbles sawmills rumbles rhymeless ramillies melees mumbles chimleys limeless gumless gambles fumbles mealless tamales tomalleys wambles shameless
smiley smile samiel simile small smell smelly