• 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 branches and a trunk. 木 is also used as a building block in many kanji — especially as the left-side radical 木偏きへん. Many kanji related to plants, wood, or structure include this component.