magnetic pyrites vs pyrrhotite

magnetic pyrites and pyrrhotite both are nouns.

Word	Noun	Adjective	Verb	Adverb
magnetic pyrites	Yes	No	No	No
pyrrhotite	Yes	No	No	No

As nouns, magnetic pyrites and pyrrhotite are synonyms defined as:

magnetic pyrites and pyrrhotite: a brownish iron sulfide mineral (FeS) having weak magnetic properties

Other synonyms of magnetic pyrites include pyrrhotine.

magnetic pyrites (noun)	pyrrhotite (noun)
a brownish iron sulfide mineral (FeS) having weak magnetic properties	a brownish iron sulfide mineral (FeS) having weak magnetic properties