General terms:
* Magnitude: This refers to the size or importance of something.
* Scale: This refers to the relative size of something, often compared to something else.
* Dimension: This refers to a measurable aspect of something, such as length, width, or height.
* Extent: This refers to the range or scope of something.
* Scope: This refers to the breadth or range of something.
* Amplitude: This refers to the size or range of a variation, often used in scientific contexts.
More specific terms:
* Volume: This refers to the amount of space something occupies.
* Area: This refers to the amount of surface something covers.
* Capacity: This refers to the amount something can hold.
* Bulk: This refers to the physical size or mass of something.
* Quantity: This refers to the amount of something, often used in a numerical context.
The best word to use will depend on the specific situation. For example, you might use "magnitude" to describe the size of a problem, "scale" to describe the size of a map, or "extent" to describe the range of a study.