hitting vs header

hitting and header both are nouns.

Word	Noun	Adjective	Verb	Adverb
hitting	Yes	No	No	No
header	Yes	No	No	No

As nouns, header is a hyponym of hitting; that is, header is a word with a more specific, narrower meaning than hitting:

hitting (noun)	header (noun)
the act of contacting one thing with another	(soccer) the act of hitting the ball with your head
	a headlong jump (or fall)
	a machine that cuts the heads off grain and moves them into a wagon
	a framing member crossing and supporting the ends of joists, studs, or rafters so as to transfer their weight to parallel joists, studs, or rafters
	brick that is laid sideways at the top of a wall
	horizontal beam used as a finishing piece over a door or window
	a line of text serving to indicate what the passage below it is about