nimbleness vs mental dexterity

nimbleness and mental dexterity both are nouns.

Word	Noun	Adjective	Verb	Adverb
nimbleness	Yes	No	No	No
mental dexterity	Yes	No	No	No

As nouns, nimbleness and mental dexterity are synonyms defined as:

nimbleness and mental dexterity: intelligence as revealed by quickness and alertness of mind

nimbleness (noun)	mental dexterity (noun)
the gracefulness of a person or animal that is quick and nimble	intelligence as revealed by quickness and alertness of mind
intelligence as revealed by quickness and alertness of mind