The word "chalker" can refer to someone who marks or draws with chalk. Other synonyms for this word include "chalk artist," "chalk drawer," "chalk marker," or simply "chalk user." Each of these terms describes someone who uses chalk as a medium to create drawings or write messages. "Chalkboard writer" is another synonym that specifically refers to someone who writes on chalkboards, while "chalk painter" could refer to someone who uses chalk to create more elaborate and intricate designs or paintings. Ultimately, all of these synonyms capture the essence of someone who is skilled in using chalk as a means of artistic expression or communication.