incredulity vs dubiety

incredulity and dubiety both are nouns.

Word	Noun	Adjective	Verb	Adverb
incredulity	Yes	No	No	No
dubiety	Yes	No	No	No

As nouns, dubiety is a hypernym of incredulity; that is, dubiety is a word with a broader meaning than incredulity:

Other hypernyms of incredulity include doubt, doubtfulness, dubiousness, incertitude, uncertainty.

incredulity (noun)	dubiety (noun)
doubt about the truth of something	the state of being unsure of something