afters vs course

afters and course both are nouns.

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

As nouns, course is a hypernym of afters; that is, course is a word with a broader meaning than afters:

afters (noun)	course (noun)
a dish served as the last course of a meal	a mode of action
	education imparted in a series of lessons or meetings
	facility consisting of a circumscribed area of land or water laid out for a sport
	(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

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