carefulness vs cautiousness

carefulness and cautiousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
carefulness	Yes	No	No	No
cautiousness	Yes	No	No	No

As nouns, carefulness and cautiousness are synonyms defined as:

carefulness and cautiousness: the trait of being cautious; being attentive to possible danger

Other synonyms of carefulness include caution.

carefulness (noun)	cautiousness (noun)
the quality of being careful and painstaking	the trait of being cautious; being attentive to possible danger
the trait of being cautious; being attentive to possible danger