scepticism vs uncertainty

scepticism and uncertainty both are nouns.

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

As nouns, uncertainty is a hypernym of scepticism; that is, uncertainty is a word with a broader meaning than scepticism:

Other hypernyms of scepticism include doubt, doubtfulness, dubiety, dubiousness, incertitude.

scepticism (noun)	uncertainty (noun)
the disbelief in any claims of ultimate knowledge	being unsettled or in doubt or dependent on chance
doubt about the truth of something	the state of being unsure of something