More windless means calm or still, and its antonyms are words that convey a sense of motion or unrest. Some antonyms for the word more windless include; blustery, breezy, gusty, windy, tempestuous, stormy, tumultuous, choppy, and agitated. These antonyms describe a state of increased wind or waves, often associated with a change in weather patterns, which can create dangerous situations for people on land and at sea. Whether you're a sailor or simply enjoy spending time outdoors, it's important to be aware of the weather conditions so that you can best prepare for any changes in wind or ocean currents.