espial vs spotting

espial and spotting both are nouns.

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

As nouns, espial and spotting are synonyms defined as:

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

Other synonyms of espial include catching, detection, spying.

espial (noun)	spotting (noun)
the act of detecting something; catching sight of something	the act of detecting something; catching sight of something
	the act of spotting or staining something