The term 'ADD COLOR TO' can be solved by three different words: TINCT (5 letters), DYE (3 letters), and TINT (4 letters). TINCT is a verb meaning to add color to something, usually with paint or DYE. DYE is also a verb meaning to add color to something, usually with a DYE or pigment. TINT is a noun meaning a light shade of a color, often used to describe a color that has been added to something. All three terms refer to the act of adding color to something.