mental dexterity vs nimbleness

mental dexterity and nimbleness both are nouns.

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

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

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

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