detective work vs detection

detective work and detection both are nouns.

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

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

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

Other synonyms of detective work include detecting, sleuthing.

detective work (noun)	detection (noun)
a police investigation to determine the perpetrator	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