demonstration vs demonstrate

demonstration is a noun but demonstrate is not a noun.

Word	Noun	Adjective	Verb	Adverb
demonstration	Yes	No	No	No
demonstrate	No	No	Yes	No

demonstration (noun)	demonstrate (noun)
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

demonstration (verb)	demonstrate (verb)
	establish the validity of something, as by an example, explanation or experiment
	provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
	give an exhibition of to an interested audience
	march in protest; take part in a demonstration