precocity vs precociousness

precocity and precociousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
precocity	Yes	No	No	No
precociousness	Yes	No	No	No

As nouns, precocity and precociousness are synonyms defined as:

precocity and precociousness: intelligence achieved far ahead of normal developmental schedules

precocity (noun)	precociousness (noun)
intelligence achieved far ahead of normal developmental schedules	intelligence achieved far ahead of normal developmental schedules