quietism vs religious mysticism

quietism and religious mysticism both are nouns.

Word	Noun	Adjective	Verb	Adverb
quietism	Yes	No	No	No
religious mysticism	Yes	No	No	No

As nouns, religious mysticism is a hypernym of quietism; that is, religious mysticism is a word with a broader meaning than quietism:

quietism: a form of religious mysticism requiring withdrawal from all human effort and passive contemplation of God
religious mysticism: a religion based on mystical communion with an ultimate reality

Other hypernyms of quietism include mysticism.

quietism (noun)	religious mysticism (noun)
a form of religious mysticism requiring withdrawal from all human effort and passive contemplation of God	a religion based on mystical communion with an ultimate reality