Hidden danger is a term used to describe potential risks or hazards that are not immediately obvious. The crossword solutions for this term are TRAP (4 letters), PITFALL (7 letters), LANDMINE (8 letters), and BOOBYTRAP (9 letters). A TRAP is a device designed to catch or restrain an animal or person, while a PITFALL is a hidden or unsuspected danger or difficulty. A landmine is an explosive device placed underground and designed to be triggered by the presence of a person or vehicle. Finally, a boobytrap is a device that is designed to cause injury or death when triggered.