close off vs quit

close off and quit both are verbs.

Word	Noun	Adjective	Verb	Adverb
close off	No	No	Yes	No
quit	No	No	Yes	No

As verbs, quit is a hypernym of close off; that is, quit is a word with a broader meaning than close off:

Other hypernyms of close off include cease, discontinue, give up, lay off, stop.

close off (verb)	quit (verb)
block off the passage through	give up in the face of defeat of lacking hope; admit defeat
isolate or separate	go away or leave
stem the flow of	turn away from; give up
	give up or retire from a position
	put an end to a state or an activity