Fenestral is a word that is mostly used in the field of architecture. It is a term that refers to anything relating to windows or fenestration. When it comes to synonyms for the word fenestral, some commonly used terms include fenestrated, windowed, or glassed. Other synonyms that can be used in its place include perforated, latticed, pierced or punctured. These words can all be used to describe anything with openings like a window or perforation. Architects and engineers commonly use these terms to describe specific types of window and fenestration designs in their projects.