peaceful vs passive

peaceful is not a noun while passive is a noun.

Word	Noun	Adjective	Verb	Adverb
peaceful	No	Yes	No	No
passive	Yes	Yes	No	No

As adjectives, peaceful and passive are synonyms defined as:

peaceful (noun)	passive (noun)
	the voice used to indicate that the grammatical subject of the verb is the recipient (not the source) of the action denoted by the verb

peaceful (adjective)	passive (adjective)
not disturbed by strife or turmoil or war	lacking in energy or will
peacefully resistant in response to injustice	expressing that the subject of the sentence is the patient of the action denoted by the verb
	peacefully resistant in response to injustice