infrastructure /inˈfrə-struk-chər/

1. Inner structure, structure of component parts
2. A system of communications and services as backing for military, commercial, etc operations

• tree heath
• tree hopper
• tree hoppers
• tree house
• tree houses
• tree-hugger
• tree-huggers
• tree-hugging
• treeing
• tree kangaroo
• tree kangaroos
• treeless
• treelessness
• treelessnesses
• treelike
• tree lilies
• tree lily
• tree line
• tree-lined
• tree mallow
• tree mallows
• tree moss
• tree mosses
• treen
• treenail