* Groundbreaking: Meaning innovative or pioneering.
* Groundhog: A small rodent known for its hibernation habits.
* Groundwater: Water found beneath the Earth's surface.
* Groundless: Without a basis in fact or reason.
* Groundswell: A growing movement of popular feeling or opinion.
* Groundcover: Plants that cover the ground.
* Ground floor: The lowest level of a building.
Let me know if you'd like more examples!