doubt vs dubiousness

doubt and dubiousness both are nouns.

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

As nouns, doubt and dubiousness are synonyms defined as:

doubt and dubiousness: uncertainty about the truth or factuality or existence of something

Other synonyms of doubt include doubtfulness, question.

As nouns, doubt and dubiousness are synonyms defined as:

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

doubt (noun)	dubiousness (noun)
uncertainty about the truth or factuality or existence of something	uncertainty about the truth or factuality or existence of something
the state of being unsure of something	the state of being unsure of something

doubt (verb)	dubiousness (verb)
consider unlikely
lack confidence in