espial vs spying

espial and spying both are nouns.

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

As nouns, espial and spying are synonyms defined as:

espial and spying: the act of detecting something; catching sight of something

Other synonyms of espial include catching, detection, spotting.

espial (noun)	spying (noun)
the act of detecting something; catching sight of something	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