detection vs detective work

detection and detective work both are nouns.

Word	Noun	Adjective	Verb	Adverb
detection	Yes	No	No	No
detective work	Yes	No	No	No

As nouns, detection and detective work are synonyms defined as:

detection and detective work: a police investigation to determine the perpetrator

Other synonyms of detection include detecting, sleuthing.

detection (noun)	detective work (noun)
the act of detecting something; catching sight of something	a police investigation to determine the perpetrator
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