air power vs aviation

air power and aviation both are nouns.

Word	Noun	Adjective	Verb	Adverb
air power	Yes	No	No	No
aviation	Yes	No	No	No

As nouns, air power and aviation are synonyms defined as:

air power and aviation: the aggregation of a country's military aircraft

air power (noun)	aviation (noun)
the aggregation of a country's military aircraft	travel via aircraft
	the art of operating aircraft
	the aggregation of a country's military aircraft
	the operation of aircraft to provide transportation