demonstration vs armed forces

demonstration and armed forces both are nouns.

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

demonstration (noun)	armed forces (noun)
a show or display; the act of presenting something to sight or view	the military forces of a nation
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