scepticism vs agnosticism

scepticism and agnosticism both are nouns.

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

As nouns, scepticism and agnosticism are synonyms defined as:

scepticism and agnosticism: the disbelief in any claims of ultimate knowledge

Other synonyms of scepticism include skepticism.

scepticism (noun)	agnosticism (noun)
the disbelief in any claims of ultimate knowledge	the disbelief in any claims of ultimate knowledge
doubt about the truth of something	a religious orientation of doubt; a denial of ultimate knowledge of the existence of God