detective work vs sleuthing

detective work and sleuthing both are nouns.

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

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

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

Other synonyms of detective work include detecting, detection.

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