religious mystic vs worshiper

religious mystic and worshiper both are nouns.

Word	Noun	Adjective	Verb	Adverb
religious mystic	Yes	No	No	No
worshiper	Yes	No	No	No

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

religious mystic: someone who believes in the existence of realities beyond human comprehension
worshiper: a person who has religious faith

Other hypernyms of religious mystic include believer, worshipper.

religious mystic (noun)	worshiper (noun)
someone who believes in the existence of realities beyond human comprehension	a person who has religious faith
	someone who admires too much to recognize faults