calm down vs solace

calm down is not a noun while solace is a noun.

Word	Noun	Adjective	Verb	Adverb
calm down	No	No	Yes	No
solace	Yes	No	Yes	No

As verbs, solace is a hypernym of calm down; that is, solace is a word with a broader meaning than calm down:

Other hypernyms of calm down include comfort, console, soothe.

calm down (noun)	solace (noun)
	the act of consoling; giving relief in affliction
	the comfort you feel when consoled in times of disappointment
	comfort in disappointment or misery

calm down (verb)	solace (verb)
become quiet or less intensive	give moral or emotional strength to
make calm or still
become quiet or calm, especially after a state of agitation