As nouns the difference between quietism and quietist
is that quietism is a form of mysticism involving quiet contemplation while quietist is a mystic who follows quietism.
quietist
English
Noun
(
en noun)
A mystic who follows quietism.
Someone who is not socially or politically active.
*1985 , (Lawrence Durrell), Quinx'', Faber & Faber 2004 (''Avignon Quintet ), p. 1267:
*:You need not give in to media clowns or dozing quietists .