demanding vs stern

demanding is not a noun while stern is a noun.

Word	Noun	Adjective	Verb	Adverb
demanding	No	Yes	No	No
stern	Yes	Yes	No	No

demanding (noun)	stern (noun)
	the rear part of a ship
	the fleshy part of the human body that you sit on

demanding (adjective)	stern (adjective)
requiring more than usually expected or thought due; especially great patience and effort and skill	severe and unremitting in making demands
	not to be placated or appeased or moved by entreaty
	of a stern or strict bearing or demeanor; forbidding in aspect
	severely simple