| optic chiasm | |
| organ of thought(expression, idiom) | |
| pallium | |
| parietal lobe | |
| penetration(noun, understanding, understand, sense, judgment) | |
| perception(noun, understanding, mind, understand, sense) | |
| peripheral nervous system(expression, idiom) | |
| perspicacity(noun, understanding, mind, understand, sense) | |
| pia mater | |
| pineal body | |
| pituitary body | |
| plexus | |
| pons | |
| power of reason(expression, idiom) | |
| precocity(noun, understanding, mind, skill, understand) | |
| psyche | |
| quickness(noun, understanding, skill, understand, sense) | |
| quotient(noun, understanding, skill, understand, sense) | |
| rationality | |
| reasoning |
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| APA | Smart Define. (2015). gray matter thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/gray_matter/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "gray matter thesaurus" https://smartdefine.org/gray_matter/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, gray matter thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/gray_matter/thesaurus/synonyms>. |
| MLA | Smart Define. "gray matter thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/gray_matter/thesaurus/synonyms> |