Adjacent Fabric" isn't a standard term, so I need to understand what you mean by it.
Looking for a fabric that is commonly used with another specific fabric? (e.g., what fabric is often used as a lining for denim?)
Trying to find a fabric that has properties similar to another fabric? (e.g., what fabric feels like silk but is easier to care for?)
Describing a fabric that is next to another fabric in a design or garment? (e.g., how would you describe the trim fabric next to the main body fabric?)
Something else entirely?
Once I have a better idea of what "Adjacent Fabric" means to you, I can provide a much more helpful description!