However, you could use some options like:
* A pile of rugs
* A collection of rugs
* A spread of rugs
* A display of rugs
You can also use more descriptive terms depending on the context, like:
* A tapestry of rugs (for a variety of colors and patterns)
* A layer of rugs (for rugs stacked on top of each other)
* A gallery of rugs (for a collection of rugs displayed in a specific way)
Ultimately, the best collective noun depends on the specific situation and the image you want to evoke.