detective vs tracer

detective and tracer both are nouns.

Word	Noun	Adjective	Verb	Adverb
detective	Yes	No	No	No
tracer	Yes	No	No	No

As nouns, tracer is a hyponym of detective; that is, tracer is a word with a more specific, narrower meaning than detective:

detective: a police officer who investigates crimes
tracer: an investigator who is employed to find missing persons or missing goods

Other hyponyms of detective include dick, gumshoe, hawkshaw, plainclothesman.

detective (noun)	tracer (noun)
a police officer who investigates crimes	ammunition whose flight can be observed by a trail of smoke
an investigator engaged or employed in obtaining information not easily available to the public	(radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
	an instrument used to make tracings
	an investigator who is employed to find missing persons or missing goods