* Shape: This refers to the outward appearance of something.
* Structure: This refers to the arrangement or organization of something.
* Format: This refers to the specific arrangement or style of something.
* Configuration: This refers to the particular arrangement or structure of something.
* Design: This refers to the plan or blueprint for something.
* Style: This refers to the characteristic or distinctive way in which something is done or made.
The best abstract noun to use will depend on the context of your sentence.