spying vs discovery

spying and discovery both are nouns.

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

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

Other hypernyms of spying include find, uncovering.

spying (noun)	discovery (noun)
the act of keeping a secret watch for intelligence purposes	the act of discovering something
keeping a secret or furtive watch	a productive insight
the act of detecting something; catching sight of something	something that is discovered
	(law) compulsory pretrial disclosure of documents relevant to a case; enables one side in a litigation to elicit information from the other side concerning the facts in the case