mystic vs quietist

mystic and quietist both are nouns.

Word	Noun	Adjective	Verb	Adverb
mystic	Yes	Yes	No	No
quietist	Yes	No	No	No

As nouns, quietist is a hyponym of mystic; that is, quietist is a word with a more specific, narrower meaning than mystic:

mystic: someone who believes in the existence of realities beyond human comprehension
quietist: a religious mystic who follows quietism

mystic (noun)	quietist (noun)
someone who believes in the existence of realities beyond human comprehension	a religious mystic who follows quietism

mystic (adjective)	quietist (adjective)
relating to or characteristic of mysticism
relating to or resembling mysticism
having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding