calm down vs cool off

calm down and cool off both are verbs.

Word	Noun	Adjective	Verb	Adverb
calm down	No	No	Yes	No
cool off	No	No	Yes	No

As verbs, calm down and cool off are synonyms defined as:

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

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

calm down (verb)	cool off (verb)
become quiet or less intensive	lose intensity
make calm or still	become quiet or calm, especially after a state of agitation
become quiet or calm, especially after a state of agitation	feel less enamoured of something or somebody