agnostic vs gnostic

agnostic is a noun but gnostic is not a noun.

Word	Noun	Adjective	Verb	Adverb
agnostic	Yes	Yes	No	No
gnostic	No	Yes	No	No

agnostic (noun)	gnostic (noun)
a person who claims that they cannot have true knowledge about the existence of God (but does not deny that God might exist)
someone who is doubtful or noncommittal about something

agnostic (adjective)	gnostic (adjective)
uncertain of all claims to knowledge	possessing intellectual or esoteric knowledge of spiritual things
of or pertaining to an agnostic or agnosticism