A basic sketch is a preliminary drawing, typically done with simple lines and shapes. It is a rough outline of a design or concept that can be further developed into a more detailed drawing or artwork. Some synonyms for basic sketch include preliminary drawing, outline, draft, rough sketch, initial sketch, preliminary design, and rough draft. These terms emphasize the preliminary nature of the drawing, as well as the fact that it is still in the early stages of development. By using different synonyms, artists and designers can communicate their ideas more effectively with colleagues, clients, and collaborators.