Synonyms:
* Intelligence: This is a common synonym, highlighting the mental sharpness associated with brilliance.
* Genius: A more extreme form of brilliance, suggesting exceptional talent or insight.
* Cleverness: This focuses on the ability to think creatively and solve problems.
* Insight: This refers to deep understanding and the ability to see things clearly.
* Talent: This emphasizes natural ability or skill in a particular area.
Antonyms:
* Dullness: The opposite of brightness, both literally and figuratively.
* Stupidity: A lack of intelligence or understanding.
* Mediocrity: Lacking distinction or excellence.
* Ignorance: A lack of knowledge or awareness.
* Obtuseness: A lack of sharpness or sensitivity.
Example:
* "Her brilliance was evident in her insightful analysis." (Synonym - brilliance as intellectual acuity)
* "The presentation was dull and lacked brilliance." (Antonym - brilliance as engaging and exciting)
So, it really depends on what aspect of "brilliance" you want to highlight.