military strength vs military

military strength and military both are nouns.

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

military strength (noun)	military (noun)
capability in terms of personnel and materiel that affect the capacity to fight a war	the military forces of a nation

military strength (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