call it quits vs quit

call it quits and quit both are verbs.

Word	Noun	Adjective	Verb	Adverb
call it quits	No	No	Yes	No
quit	No	No	Yes	No

As verbs, quit is a hypernym of call it quits; that is, quit is a word with a broader meaning than call it quits:

Other hypernyms of call it quits include cease, discontinue, give up, lay off, stop.

call it quits (verb)	quit (verb)
stop doing what one is doing	give up in the face of defeat of lacking hope; admit defeat
	go away or leave
	turn away from; give up
	give up or retire from a position
	put an end to a state or an activity