General:
* Separation: This emphasizes the physical space between two things.
* Space: This is a broad term that encompasses both physical and conceptual distances.
* Gap: This is often used to describe a metaphorical distance between people or ideas.
* Spread: This emphasizes the extent of something's reach or coverage.
Specific:
* Proximity: The opposite of distance, meaning closeness.
* Span: Used to describe the physical distance between two points.
* Reach: Used to describe the distance something can cover.
* Range: The maximum distance something can travel or operate.
Figurative:
* Disparity: A significant difference in quality or amount.
* Difference: A distinction between two things.
* Divide: A separation that creates a gap between people or groups.
* Alienation: A feeling of being distant or isolated.
To choose the best synonym, consider the specific context and the nuance you want to convey.