The term 'Old Masters' refers to a group of European painters from the 15th to the 18th centuries who were renowned for their skill and influence. The two crossword solutions for this term are 'oils' (4 letters) and 'artists' (7 letters). Oils refer to the type of paint used by the Old Masters, which was made from pigments mixed with linseed oil. Artists refers to the individuals who created the works of art, such as Rembrandt, Michelangelo, and Raphael.