lecture vs lecture demonstration

lecture and lecture demonstration both are nouns.

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

lecture (noun)	lecture demonstration (noun)
teaching by giving a discourse on some subject (typically to a class)	presentation of an example of what the lecturer is discoursing about
a speech that is open to the public
a lengthy rebuke

lecture (verb)	lecture demonstration (verb)
censure severely or angrily
deliver a lecture or talk