Most cushiony is a term that describes softness, comfort, and plushness. Antonyms for most cushiony would include hard, firm, and rigid. Other antonyms that can be used to describe a surface or object that is not cushiony include unyielding, rough, and coarse. Conversely, antonyms for most cushiony can also be used to describe a feeling or sensation that is not comfortable or pleasant. These can include uneasy, uncomfortable, and unpleasant. Regardless of the context, antonyms for most cushiony are words that describe a lack of softness, comfort, and support.