peacenik vs pacificist

peacenik and pacificist both are nouns.

Word	Noun	Adjective	Verb	Adverb
peacenik	Yes	No	No	No
pacificist	Yes	No	No	No

As nouns, pacificist is a hypernym of peacenik; that is, pacificist is a word with a broader meaning than peacenik:

peacenik: someone who prefers negotiations to armed conflict in the conduct of foreign relations
pacificist: someone opposed to violence as a means of settling disputes

Other hypernyms of peacenik include disarmer, pacifist.

peacenik (noun)	pacificist (noun)
someone who prefers negotiations to armed conflict in the conduct of foreign relations	someone opposed to violence as a means of settling disputes