• 木造もくぞう — wooden structure / made of wood
• 木工もっこう — woodworking / woodcraft
• 木登きのぼり — tree climbing
• 木陰こかげ — shade of a tree
• 木材もくざい — timber / lumber
• 木この葉は — tree leaves

The character looks like a tree with its branches and trunk. In fact, 木 is often used as a building block in other kanji — especially when it appears on the left side as a radical called 木偏きへん. Many characters related to plants, wood, or structure include this component.

大おおきな木きが あります。
There is a big tree.

木造もくぞうの家いえに住すんでいます。
I live in a wooden house.