Definitions:
a shot or pass made with the head

a headlong fall or dive.

a brick or stone laid at right angles to the face of a wall.

a line or block of text appearing at the top of each page of a book or document.

a raised tank of water maintaining pressure in a plumbing system.

a person who ropes a steer by its head (as opposed to its heels), especially in a team-roping rodeo event

a mad or foolish person.