settle down vs cool off

settle down and cool off both are verbs.

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

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

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

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

settle down (verb)	cool off (verb)
become settled or established and stable in one's residence or life style	lose intensity
become quiet or calm, especially after a state of agitation	become quiet or calm, especially after a state of agitation
settle into a position, usually on a surface or ground	feel less enamoured of something or somebody