The antonyms for "blastoffs" are related to the opposite of initiation, movement or action. These words include "arrivals," "landings," and "stops." An arrival suggests a stationary and settled state of being, while a landing can signify a slower or more deliberate pace of moving downwards. Similarly, a stop implies halting action altogether. Antonyms for "blastoffs" also include "endings," "conclusions," and "finishings." These words suggest winding down or bringing an activity to a close. While a blastoff represents the start of something exciting, its antonyms indicate a more static, concluding state of being.