cool it vs settle down

cool it and settle down both are verbs.

Word	Noun	Adjective	Verb	Adverb
cool it	No	No	Yes	No
settle down	No	No	Yes	No

As verbs, cool it and settle down are synonyms defined as:

cool it and settle down: become quiet or calm, especially after a state of agitation

Other synonyms of cool it include calm, calm down, chill out, cool off, simmer down.

cool it (verb)	settle down (verb)
become quiet or calm, especially after a state of agitation	become settled or established and stable in one's residence or life style
	become quiet or calm, especially after a state of agitation
	settle into a position, usually on a surface or ground