espial vs detection

espial and detection both are nouns.

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

As nouns, espial and detection are synonyms defined as:

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

Other synonyms of espial include catching, spotting, spying.

espial (noun)	detection (noun)
the act of detecting something; catching sight of something	the act of detecting something; catching sight of something
	a police investigation to determine the perpetrator
	the perception that something has occurred or some state exists
	the detection that a signal is being received