football game vs tackle

football game and tackle both are nouns.

Word	Noun	Adjective	Verb	Adverb
football game	Yes	No	No	No
tackle	Yes	No	Yes	No

football game (noun)	tackle (noun)
any of various games played with a ball (round or oval) in which two teams try to kick or carry or propel the ball into each other's goal	(American football) grasping an opposing player with the intention of stopping by throwing to the ground
	(American football) a position on the line of scrimmage, typically opposite one of the offensive guards
	gear consisting of ropes etc. supporting a ship's masts and sails
	gear used in fishing
	the person who plays offensive or defensive tackle on a football team

football game (verb)	tackle (verb)
	seize and throw down an opponent player, who usually carries the ball
	put a harness
	accept as a challenge