lesson vs course

lesson and course both are nouns.

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

lesson (noun)	course (noun)
a task assigned for individual study	a mode of action
a unit of instruction	education imparted in a series of lessons or meetings
punishment intended as a warning to others	facility consisting of a circumscribed area of land or water laid out for a sport
the significance of a story or event	(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

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