grou - high
- ground magnetometer
- ground mapping
- ground mat
- ground microwave-powered interorbital vehicle
- ground network
- ground noise
- ground observing system
- ground operating time
- ground overcurrent protection
- ground overvoltage protection
- ground painting
- ground paper
- ground personnel
- ground piece
- ground pillar guide
- ground plan
- ground plane
- ground plate
- ground plug
- ground potential
- ground power unit
- ground pressure
- ground probing
- ground profile
- ground prop
- ground prospecting
- ground proximity warning system
- ground radio operator
- ground radiometry
- ground range
- ground ray
- ground reaction
- ground reconnaissance
- ground reflectance
- ground return
- ground return path
- ground rod
- ground roller
- ground run
- ground seine