demagnetize vs physics

demagnetize is not a noun while physics is a noun.

Word	Noun	Adjective	Verb	Adverb
demagnetize	No	No	Yes	No
physics	Yes	No	No	No

demagnetize (noun)	physics (noun)
	the science of matter and energy and their interactions
	the physical properties, phenomena, and laws of something

demagnetize (verb)	physics (verb)
make nonmagnetic; take away the magnetic properties (of)
erase (a magnetic storage device)