The word "crashlanded" refers to the act of landing a aircraft or spacecraft suddenly and violently. The antonyms of this word are those that describe a controlled and smooth landing. Some of the antonyms for crashlanded are- "landed safely", "landed smoothly", "landed gently", and "landed without incident". These words imply a landing that is free of any damage or destruction to the vehicle or its occupants. They also suggest a well-planned and executed landing that does not involve any abrupt or uncontrolled movements. Therefore, the antonyms of "crashlanded" emphasize safety, control, and a successful landing without any mishaps.