A building wing is an extension of a building, usually consisting of additional rooms or floors. The crossword solutions for the term 'building wing' include ELL (3 letters), ANNEXE (6 letters), ALETTE (6 letters), ADDITION (8 letters), ANNEX (5 letters), ADDON (5 letters), and LEANTO (6 letters). An ELL is a wing of a building that projects out from the main structure. An ANNEXE is an additional structure that is connected to a main building. An ALETTE is a small wing or ANNEXE of a building. An ADDITION is an extension or enlargement of a building. An ANNEX is an additional building or part of a building that is connected to the main structure. An ADDON is an extra part or feature added to something that already exists. A LEANTO is a small structure, often open on one side, that is attached to a larger building.