Odd
Odd adjective - Being one of a pair or set without a corresponding mate.
Unsolvable and odd are semantically related. In some cases you can use "Unsolvable" instead an adjective "Odd".
Unsolvable
Unsolvable adjective - Incapable of being solved or accomplished.
Odd and unsolvable are semantically related. Sometimes you can use "Odd" instead an adjective "Unsolvable".
Mutual synonyms
Both words in one sentence
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Logic Bomb: In a sketch parodying 2001: A Space Odyssey, a pair of astronauts stop their computer from singing "Row, Row, Row Your Boat" all day long by giving it an unsolvable algorithm: Start with 3, add 2, if answer is even, stop, if odd, add 2 again, repeat.
Source: Series / Square One TV -
In a Square One TV sketch parodying 2001: A Space Odyssey, a pair of astronauts stop their computer from singing "Row, Row, Row Your Boat" all day long by giving it an unsolvable algorithm: Start with 3, add 2, if answer is even, stop, if odd, add 2 again, repeat.
Source: Logic Bomb
Cite this Source
Unsolvable and Odd. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/odd/unsolvable
Odd & Unsolvable. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/odd/unsolvable>.
Unsolvable or Odd. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/odd/unsolvable.
Google Ngram Viewer shows how "odd" and "unsolvable" have occurred on timeline