sea power vs posture

sea power and posture both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea power	Yes	No	No	No
posture	Yes	No	Yes	No

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

sea power: naval strength
posture: capability in terms of personnel and materiel that affect the capacity to fight a war

Other hypernyms of sea power include military capability, military posture, military strength, strength.

sea power (noun)	posture (noun)
naval strength	the arrangement of the body and its limbs
a nation that possesses formidable naval strength	characteristic way of bearing one's body
	capability in terms of personnel and materiel that affect the capacity to fight a war
	a rationalized mental attitude

sea power (verb)	posture (verb)
	assume a posture as for artistic purposes
	behave affectedly or unnaturally in order to impress others