Check over is an action that means to examine or review something thoroughly. The antonyms for this word would be to neglect, ignore, overlook, or miss. Neglecting or ignoring something means to completely disregard it and not give it any attention or consideration. Overlooking means to not notice something that should be evident or significant. Missing means to fail to observe or catch something that is present. These antonyms all suggest a lack of careful attention or consideration. So, it's important to check over everything thoroughly to avoid these outcomes.