The term 'put in an appearance' is an idiom that means to make a brief or unexpected visit, usually for the purpose of being seen. The crossword solutions for this term are COME (4 letters), CAME (4 letters), SHOUP (5 letters), and SHOWUP (6 letters). All of these words can be used to describe someone making a brief visit, with COME and CAME referring to the act of arriving, and SHOUP and SHOWUP referring to the act of appearing.