Casper is a popular fictional character, first appearing in the 1940s as a friendly GHOST. He is often depicted as a white, child-like GHOST with a mischievous personality. The crossword solutions for the term CASPER are MEEK (4 letters), HAUNT (5 letters), GHOST (5 letters), and GHOSTS (6 letters). These words all describe aspects of Casper's character, from his MEEK and gentle nature to his ability to HAUNT and be seen as a GHOST or group of GHOSTS.