firepower vs military posture

firepower and military posture both are nouns.

Word	Noun	Adjective	Verb	Adverb
firepower	Yes	No	No	No
military posture	Yes	No	No	No

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

firepower: (military) the relative capacity for delivering fire on a target
military posture: capability in terms of personnel and materiel that affect the capacity to fight a war

Other hypernyms of firepower include military capability, military strength, posture, strength.

firepower (noun)	military posture (noun)
(military) the relative capacity for delivering fire on a target	capability in terms of personnel and materiel that affect the capacity to fight a war