tackle vs harpoon

tackle and harpoon both are nouns.

Word	Noun	Adjective	Verb	Adverb
tackle	Yes	No	Yes	No
harpoon	Yes	No	Yes	No

tackle (noun)	harpoon (noun)
(American football) grasping an opposing player with the intention of stopping by throwing to the ground	a spear with a shaft and barbed point for throwing; used for catching large fish or whales; a strong line is attached to it
(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

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