agnostic vs agnosticism

agnostic and agnosticism both are nouns.

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

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

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