Brainy
Brainy adjective - Having or showing quickness of mind.
Usage example: a brainy student who didn't fit in socially
Thick
Thick adjective - Not having or showing an ability to absorb ideas readily.
Usage example: couldn't believe that his guests were so thick that they were missing his hints that it was time to leave
Both words in one sentence
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That's why surrounding a character with big, thick, difficult-looking books whenever possible is considered an acceptable way of indicating that that person is meant to be brainy.
Source: Super Speed Reading -
Brainy Brunette: Jo has thick chestnut hair.
Source: Literature / Little Women
Cite this Source
Thick and Brainy. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/brainy/thick
Brainy & Thick. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/brainy/thick>.
Thick or Brainy. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/brainy/thick.
Google Ngram Viewer shows how "brainy" and "thick" have occurred on timeline