Feeling giddy can be described as a dizzy, light-headed sensation that can lead to instability or lack of balance. The antonyms for feeling giddy include words like stable, balanced, steady, grounded, and composed. These words suggest a sense of control, safety, and steadiness, and describe a feeling of being totally in control of oneself. Other antonyms for feeling giddy could include words like sober, serious, somber, down-to-earth, and realistic, which again suggest a certain level of sobriety and groundedness, and a lack of the playful and whimsical energy that is often associated with feeling giddy.