The term 'covered up' can be defined by four different crossword solutions: BURIED (6 letters), hid (3 letters), CLAD (4 letters), and HIDDEN (6 letters). BURIED means to place something in the ground, while hid is a synonym for concealed or kept out of sight. CLAD is an archaic word meaning to clothe or dress, and HIDDEN is another word for concealed. All four words refer to the act of covering something up, either literally or figuratively.