Landing skids are a common feature in aircraft that help in smooth landings on rough terrain. However, the term 'landing skids' is a specific term that cannot have antonyms. Instead, we can look at the general term of 'skids', which may have antonyms. Skids, in general, can either refer to traction or friction, and in aviation, it is the latter that is relevant. Therefore, the antonyms for 'skids' in aviation can be landing wheels, landing gear, or landing struts. These features provide smooth landings and take-offs on airfields and runways. Hence, while landing skids do not have antonyms, we can use similar terms in aviation to convey a similar sense.