The green.
You are putting.
mini golf is basically putting practice with obstacles
That's called the green.
Mini Golf was invented as a tourist atraction for a southernour's hotel.
Green is a noun here, meaning a part of the golf course (putting area). The word golf is an abstract noun for a game - it is a process with rules, that cannot be seen or touched, even though the golfers and golf clubs, and fairways are all concrete nouns.
Hole out is simply finishing a hole of golf, obviously by putting the ball in the hole.
Angel Park Golf Course.
Putting
Putting
By practicing on the driving range or putting green of a golf course.
Golf