spearhead vs military

spearhead and military both are nouns.

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

spearhead (noun)	military (noun)
the head and sharpened point of a spear	the military forces of a nation
the leading military unit in an attack
someone who leads or initiates an activity (attack or campaign etc.)

spearhead (adjective)	military (adjective)
	associated with or performed by members of the armed services as contrasted with civilians
	characteristic of or associated with soldiers or the military
	of or relating to the study of the principles of warfare

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