lecturing vs lecture

lecturing and lecture both are nouns.

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

As nouns, lecturing and lecture are synonyms defined as:

lecturing and lecture: teaching by giving a discourse on some subject (typically to a class)

lecturing (noun)	lecture (noun)
teaching by giving a discourse on some subject (typically to a class)	teaching by giving a discourse on some subject (typically to a class)
	a speech that is open to the public
	a lengthy rebuke

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