The word "gradings" typically refers to the process or act of assessing, evaluating or classifying something based on a defined criteria. Antonyms for "gradings" would, therefore, relate to the opposite concept of not categorizing or evaluating something. Some possible antonyms for "gradings" could include: disorganization, ambiguity, randomness, chaos, uncertainty, unpredictability, irregularity, and lack of structure. These terms suggest a lack of order and systemic approach to describing or analyzing something, indicating a more subjective or fluid interpretation rather than a clear-cut classification system.