You can argue about how individuals should interpret wood, but that doesn't change that there would be more than one person who thinks like I do, to me, wood = natural wood or timber, wooden = natural wood or timber and MDF = MDF - a man-made product with some wood particles in it, along with other stuff to hold it together  

If there is any doubt about a product - I just reckon bite the bullet and add to descriptions as additional clarifying details can save for disappointment on both sides of any transaction. Might only cater for a few buyers, but better safe than red dots I reckon.