agnosticism vs agnostic

agnosticism and agnostic both are nouns.

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

agnosticism (noun)	agnostic (noun)
the disbelief in any claims of ultimate knowledge	a person who claims that they cannot have true knowledge about the existence of God (but does not deny that God might exist)
a religious orientation of doubt; a denial of ultimate knowledge of the existence of God	someone who is doubtful or noncommittal about something

agnosticism (adjective)	agnostic (adjective)
	uncertain of all claims to knowledge
	of or pertaining to an agnostic or agnosticism