ferromagnetism vs ferromagnetic

ferromagnetism is a noun but ferromagnetic is not a noun.

Word	Noun	Adjective	Verb	Adverb
ferromagnetism	Yes	No	No	No
ferromagnetic	No	Yes	No	No

ferromagnetism (noun)	ferromagnetic (noun)
phenomenon exhibited by materials like iron (nickel or cobalt) that become magnetized in a magnetic field and retain their magnetism when the field is removed

ferromagnetism (adjective)	ferromagnetic (adjective)
	relating to or demonstrating ferromagnetism