Antonyms for the phrase "topple over" can vary depending on the context in which the phrase is used. In general, antonyms for this phrase may include "stand upright," "remain steady," or "stay balanced." Other possible antonyms may depend on the specific meaning of "topple over" in a given sentence. In some cases, antonyms may include "rise up," "climb up," or "ascend," indicating a movement upward rather than a tumble or fall. Alternatively, antonyms may include words that suggest stability or permanence, such as "rooted," "anchored," or "fixed." Overall, antonyms for "topple over" tend to emphasize the opposite movement or state of imbalance or instability.