distrust vs dubiousness

distrust and dubiousness both are nouns.

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

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

Other hypernyms of distrust include doubt, doubtfulness, dubiety, incertitude, uncertainty.

distrust (noun)	dubiousness (noun)
the trait of not trusting others	uncertainty about the truth or factuality or existence of something
doubt about someone's honesty	the state of being unsure of something

distrust (verb)	dubiousness (verb)
regard as untrustworthy; regard with suspicion; have no faith or confidence in