What is another term for a package of shingles?

The correct term for a package of shingles is referred to as a "bundle." In the context of roofing, bundles are used to package and sell shingles, and they typically contain a specific number of shingles (often enough to cover a certain area) that makes it easier for contractors and homeowners to purchase the material needed for roofing projects. This terminology is widely accepted in the construction industry, particularly in roofing.

The other terms mentioned, while they might imply some sort of packaging or grouping, are not standard terminology within the roofing industry. "Square" is a roofing measurement that pertains to an area covered by shingles (100 square feet), rather than a package itself. "Parcel" generally refers to any package or shipment but lacks specific relevance to roofing materials. "Crate" is typically associated with larger containers used for bulk shipping but does not specifically apply to the way shingles are sold or packaged in the roofing trade.