brainy vs brilliant

brainy and brilliant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
brainy	No	Yes	No	No
brilliant	No	Yes	No	No

As adjectives, brainy and brilliant are synonyms defined as:

brainy and brilliant: having or marked by unusual and impressive intelligence

Other synonyms of brainy include smart as a whip.

brainy (adjective)	brilliant (adjective)
having or marked by unusual and impressive intelligence	full of light; shining intensely
	having strong or striking color
	characterized by grandeur
	having or marked by unusual and impressive intelligence
	clear and sharp and ringing
	of surpassing excellence