smart as a whip vs intelligent

smart as a whip and intelligent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
smart as a whip	No	Yes	No	No
intelligent	No	Yes	No	No

smart as a whip (adjective)	intelligent (adjective)
having or marked by unusual and impressive intelligence	having the capacity for thought and reason especially to a high degree
	endowed with the capacity to reason
	exercising or showing good judgment
	possessing sound knowledge