remonstrate vs lecture

remonstrate is not a noun while lecture is a noun.

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

As verbs, remonstrate and lecture are synonyms defined as:

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

remonstrate (verb)	lecture (verb)
argue in protest or opposition	censure severely or angrily
present and urge reasons in opposition	deliver a lecture or talk
censure severely or angrily