demonetisation vs ending

demonetisation and ending both are nouns.

Word	Noun	Adjective	Verb	Adverb
demonetisation	Yes	No	No	No
ending	Yes	No	No	No

As nouns, ending is a hypernym of demonetisation; that is, ending is a word with a broader meaning than demonetisation:

demonetisation: ending something (e.g. gold or silver) as no longer the legal tender of a country
ending: the act of ending something

Other hypernyms of demonetisation include conclusion, termination.

demonetisation (noun)	ending (noun)
ending something (e.g. gold or silver) as no longer the legal tender of a country	the act of ending something
	the end of a word (a suffix or inflectional ending or final morpheme)
	the last section of a communication
	event whose occurrence ends something
	the point in time at which something ends