Brainy
Brainy adjective - Having or showing quickness of mind.
Usage example: a brainy student who didn't fit in socially
Cuckoo
Cuckoo adjective - Showing or marked by a lack of good sense or judgment.
Usage example: offered a completely cuckoo suggestion for using the defunct strip mall
Nearby Word: cuckooing
Both words in one sentence
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She also advises Aurora, a brainy elf child who helps Santa in their mission, to appreciate Cloud Cuckoo Lander Clement, whose weird ideas help establish numerous Christmas traditions.
Source: Mrs. Claus -
Poland, a Cloud Cuckoo Lander Dumb Blond (most of the time) who often behaves like a Spoiled Brat, and Lithuania, a humble, painfully kind and patient Brainy Brunet who's even more serious than Germany.
Source: Hair Contrast Duo
Cite this Source
Cuckoo and Brainy. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/brainy/cuckoo
Brainy & Cuckoo. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/brainy/cuckoo>.
Cuckoo or Brainy. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/brainy/cuckoo.
Google Ngram Viewer shows how "brainy" and "cuckoo" have occurred on timeline