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.
drably durably drabble dribbly durable trebly dribble triable tribally doorbell terribly tearable treble tribal trouble terrible trueblue
variably drably curably bearably durably sharable wearable triable bearable trebly arable hireable dribbly errable hearable pourable marbly friable terribly tribally variable barrable wirable parable verbally tearable hirable durable crabbily horribly curable grubbily rubbly fireable burbly shareable