believer vs mystic

believer and mystic both are nouns.

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

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

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

believer (noun)	mystic (noun)
a person who has religious faith	someone who believes in the existence of realities beyond human comprehension
a supporter who accepts something as true

believer (adjective)	mystic (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