brainy vs smart as a whip

brainy and smart as a whip both are adjectives.

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

As adjectives, brainy and smart as a whip are synonyms defined as:

brainy and smart as a whip: having or marked by unusual and impressive intelligence

Other synonyms of brainy include brilliant.

brainy (adjective)	smart as a whip (adjective)
having or marked by unusual and impressive intelligence	having or marked by unusual and impressive intelligence