serenity vs peace

serenity and peace both are nouns.

Word	Noun	Adjective	Verb	Adverb
serenity	Yes	No	No	No
peace	Yes	No	No	No

As nouns, serenity and peace are synonyms defined as:

Other synonyms of serenity include ataraxis, heartsease, peace of mind, peacefulness, repose.

serenity (noun)	peace (noun)
a disposition free from stress or emotion	a treaty to cease hostilities
the absence of mental stress or anxiety	the absence of mental stress or anxiety
	the state prevailing during the absence of war
	harmonious relations; freedom from disputes
	the general security of public places