armed forces vs demonstration

armed forces and demonstration both are nouns.

Word	Noun	Adjective	Verb	Adverb
armed forces	Yes	No	No	No
demonstration	Yes	No	No	No

armed forces (noun)	demonstration (noun)
the military forces of a nation	a show or display; the act of presenting something to sight or view
	a public display of group feelings (usually of a political nature)
	a show of military force or preparedness
	a visual presentation showing how something works
	proof by a process of argument or a series of proposition proving an asserted conclusion