notarize vs demonstrate

notarize and demonstrate both are verbs.

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

As verbs, demonstrate is a hypernym of notarize; that is, demonstrate is a word with a broader meaning than notarize:

notarize: authenticate as a notary
demonstrate: provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes

Other hypernyms of notarize include attest, certify, evidence, manifest.

notarize (verb)	demonstrate (verb)
authenticate as a notary	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