dubiousness vs uncertainty

dubiousness and uncertainty both are nouns.

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

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

dubiousness: uncertainty about the truth or factuality or existence of something
uncertainty: being unsettled or in doubt or dependent on chance

Other hypernyms of dubiousness include precariousness, uncertainness.

As nouns, dubiousness and uncertainty are synonyms defined as:

Other synonyms of dubiousness include doubt, doubtfulness, dubiety, incertitude.

dubiousness (noun)	uncertainty (noun)
uncertainty about the truth or factuality or existence of something	being unsettled or in doubt or dependent on chance
the state of being unsure of something	the state of being unsure of something