espionage vs spying

espionage and spying both are nouns.

Word	Noun	Adjective	Verb	Adverb
espionage	Yes	No	No	No
spying	Yes	No	No	No

As nouns, spying is a hypernym of espionage; that is, spying is a word with a broader meaning than espionage:

Other hypernyms of espionage include undercover work.

espionage (noun)	spying (noun)
the systematic use of spies to get military or political secrets	the act of keeping a secret watch for intelligence purposes
	keeping a secret or furtive watch
	the act of detecting something; catching sight of something