As an adjective brainiest
is (brainy).
As a noun brainfest is
(rare|informal) a collection or gathering of intellectuals, or intellect-based activities.
brainiest
English
Adjective
(head)
(brainy)
brainy
English
Adjective
(er)
(informal) Very intellectually capable.
Synonyms
* clever
* smart
* See also
Anagrams
*
brainfest
English
Noun
(
en noun)
(rare, informal) A collection or gathering of intellectuals, or intellect-based activities.