Dumb
Dumb adjective - Not having or showing an ability to absorb ideas readily.
Usage example: don't call him dumb just because he makes the occasional mistake like the rest of us
Thick is a synonym for dumb in stupid topic. In some cases you can use "Thick" instead an adjective "Dumb", when it comes to topics like ability.
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
Dumb is a synonym for thick in ability topic. You can use "Dumb" instead an adjective "Thick", if it concerns topics such as stupid.
Mutual synonyms
Both words in one sentence
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They may be dumb as a box of particularly dim hammers and they may fight and bitch at each other all the time, but when it really counts, they're thick as thieves (even if they don't admit it).
Source: Badass Crew -
In which Manuel became a thick, dumb, Italian.
Source: Thinly Veiled Dub Country Change -
Thick-Line Animation Too Dumb to Live: Fitz and his attempts to pull the lever that will destroy the earth.
Cite this Source
Thick and Dumb. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/dumb/thick
Dumb & Thick. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/dumb/thick>.
Thick or Dumb. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/dumb/thick.
Google Ngram Viewer shows how "dumb" and "thick" have occurred on timeline