The antonyms for the phrase "head down tilt" might include phrases that evoke verticality, or a lift upwards. These phrases might include "head up rise," "neck extended upright," or "chin lifted high." Other antonyms could include movements or postures that evoke a sense of openness, such as "heart lifted open," "shoulders back and broad," or "chest expanded." Alternatively, antonyms might evoke a sense of relaxation or surrender, such as "head back release," "neck relaxed down," or "chin lowered in surrender." Linguistic opposites for the notion of "head down tilt" could encompass a range of physical and emotional states, including alertness, joy, ease, and surrender.