Wood is associated with all living matter, including the human body.
Fire to
Water
Compatible, but need less water in Autumn when wood hibernates and is unable to absorb water, more water will rot the root of the tree.
Earth
Wood breaks up earth, a process that is taxing on itself. Generally incompatible.
Wood
Wood is happy to co-exist with other wood but become very competitive for what is necessary to their survival.
Fire
Wood gives life to fire, hence Compatible.
Metal
Metal cuts wood. Generally incompatible.