skepticism vs uncertainty

skepticism and uncertainty both are nouns.

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

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

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

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