cool off vs chill out

cool off and chill out both are verbs.

Word	Noun	Adjective	Verb	Adverb
cool off	No	No	Yes	No
chill out	No	No	Yes	No

As verbs, cool off and chill out are synonyms defined as:

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

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

cool off (verb)	chill out (verb)
lose intensity	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