The antonyms for the term "concrete happenings" can be abstract or intangible occurrences. These can include concepts, ideas, and theories that cannot be physically touched or experienced. Other antonyms may be events that are hypothetical or imaginary, such as fantasies or dreams. Additionally, natural phenomena like climate changes or seismic activity can be antonyms as they are not man-made or tangible. Supernatural events, myths, and legends are also suitable antonyms for "concrete happenings" which refer to tangible, real-life events that have occurred in the past, present, and future. Ultimately, the antonyms of "concrete happenings" encompass a wide range of non-material outcomes that cannot be physically experienced.