Antonyms for the word "crashlanding" would be gentle landing, smooth landing, controlled landing, or successful landing. These antonyms describe a landing that is carried out without incident, with the aircraft coming to a halt in a controlled manner, without any damage or harm to passengers or crew. A crash landing is considered an emergency situation, and the antonyms mentioned reflect a situation where the landing is carried out in a routine manner. Pilots are trained to perform controlled landings, which involve a gradual reduction of altitude until the aircraft touches down on the runway. When executed correctly, these landings can be almost imperceptible, providing a safe and comfortable experience for all on board.