Water from high in the mountains falls in many places to the green valley far below.

VOA: special.2009.01.07

So regulating the question of who can register the word GREEN falls squarely within the ordinary business of the Trademark Office.

FORBES: Gang Green: Rules Are Tightening. Don't Say Green If You Don't Mean Green.

That is where I think Green falls down a bit.

BBC: World Cup scouting: goalkeepers

Once you carry the bunkers the ball will not hold on the green as it falls away from the front to the back towards the rough and the road.

BBC: SPORT | Golf | Hole 4, Road