It's important to keep a head of the competition.

I hit my head on the door frame.

I'm going to head out to the store.

He has a pumpkin head.

I need to head off to the meeting.

The head of state is responsible for representing the country on the international stage.

I will head up the project.

Solving this math problem is a real head scratcher.

He is so pig-headed that he never listens to anyone else's opinion.