credulousness vs naivety

credulousness and naivety both are nouns.

Word	Noun	Adjective	Verb	Adverb
credulousness	Yes	No	No	No
naivety	Yes	No	No	No

As nouns, naivety is a hypernym of credulousness; that is, naivety is a word with a broader meaning than credulousness:

credulousness: tendency to believe too readily and therefore to be easily deceived
naivety: lack of sophistication or worldliness

Other hypernyms of credulousness include naiveness, naivete.

credulousness (noun)	naivety (noun)
tendency to believe too readily and therefore to be easily deceived	lack of sophistication or worldliness