uncertainty vs precariousness

uncertainty and precariousness both are nouns.

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

As nouns, uncertainty and precariousness are synonyms defined as:

uncertainty and precariousness: being unsettled or in doubt or dependent on chance

Other synonyms of uncertainty include uncertainness.

uncertainty (noun)	precariousness (noun)
being unsettled or in doubt or dependent on chance	extreme dangerousness
the state of being unsure of something	being unsettled or in doubt or dependent on chance