Fighters can throw strikes (sometimes called ground and pound) or apply submission holds while on the ground.

Much later Speedy's voice called out, "Hard ground!"

"Calling ground,"said the recorded voice yet again.

"Calling ground," boomed the triumphant voice of the first of the student pilots Calhoun had trained.

Depends what you call poor ground.

This is called negative ground, since the negative side of the battery is grounded to earth.

The ministry called the university "a known greenhouse and breeding ground for Hamas terrorist".

This area is called a lek or "booming ground."

Right now they were on what Sun-Tzu would call "entangling ground."