spearhead vs military force

spearhead and military force both are nouns.

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

As nouns, military force is a hypernym of spearhead; that is, military force is a word with a broader meaning than spearhead:

Other hypernyms of spearhead include force, military group, military unit.

spearhead (noun)	military force (noun)
the head and sharpened point of a spear	a unit that is part of some military service
the leading military unit in an attack
someone who leads or initiates an activity (attack or campaign etc.)

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