pike vs spearhead

pike and spearhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
pike	Yes	No	No	No
spearhead	Yes	No	Yes	No

pike (noun)	spearhead (noun)
any of several elongate long-snouted freshwater game and food fishes widely distributed in cooler parts of the Northern Hemisphere	the head and sharpened point of a spear
medieval weapon consisting of a spearhead attached to a long pole or pikestaff; superseded by the bayonet	the leading military unit in an attack
a broad highway designed for high-speed traffic	someone who leads or initiates an activity (attack or campaign etc.)
a sharp point (as on the end of a spear)
highly valued northern freshwater fish with lean flesh

pike (verb)	spearhead (verb)
	be the leader of