course vs lecture

course and lecture both are nouns.

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

course (noun)	lecture (noun)
a mode of action	teaching by giving a discourse on some subject (typically to a class)
education imparted in a series of lessons or meetings	a speech that is open to the public
facility consisting of a circumscribed area of land or water laid out for a sport	a lengthy rebuke
(construction) a layer of masonry
part of a meal served at one time
a connected series of events or actions or developments
a body of students who are taught together
general line of orientation
a line or route along which something travels or moves

course (adverb)	lecture (adverb)
as might be expected