Brain
Brain noun - A very smart person.
Complexity and brain are semantically related. In some cases you can use "Complexity" instead a noun "Brain".
Complexity
Complexity noun - The state or quality of having many interrelated parts or aspects.
Brain and complexity are semantically related. Sometimes you can use "Brain" instead a noun "Complexity".
How words are described
Both words in one sentence
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The existence of the human brain proves that it's possible to have a machine with at least the same complexity as a brain.
Source: The Singularity - When his consciousness reaches a certain degree of complexity it even activates a hidden program in his positronic brain that allows him to dream.
Source: Grew Beyond Their Programming - This is done by first building a physical analog of a human brain, but with several times the complexity, then once it has displayed the necessary capabilities, uploading the mind of one of the creators into it, and parts of the personalities of the others.
Source: Brain Uploading
Cite this Source
Complexity and Brain. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/brain/complexity
Brain & Complexity. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/brain/complexity>.
Complexity or Brain. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/brain/complexity.
Google Ngram Viewer shows how "brain" and "complexity" have occurred on timeline