Roof-slate typically refers to the thin, flat, rectangular tiles that are used to cover and protect a roof. However, there are various synonyms that can also describe this material. For example, shingles can be used to describe interlocking pieces of wood or other materials that overlay each other to form a roof covering. Similarly, tiles can also describe small rectangular or other shaped pieces of material that are used to cover a roof. Other synonyms for roof-slate may include roofing sheets, roofing panels, or even cladding, which describes the act of covering a structure with a protective layer of material. Ultimately, the term used often depends on the specific type of roofing material being used and the regional or cultural context in which it is being applied.