Answer : You can find many definitions for the word "architect". This shows that it is understood to mean person who designs and plans buildings. However, the words architect and landscape architect are not interchangeable (at least in a professional standpoint). The term architect tends to refer more specifically to structures involving vertical space (i.e., buildings), while landscape architects work on parts of architecture which take place outside of buildings – such like site development, garden design, or public realm design/masking. Architects have traditionally been the people to design buildings, bridges, parks etc., but what these days we call landscape architects (or sometimes environmental designers) - all of them would be different types of architects working at different levels within their field.