When it comes to expressing the concept of being "far behind", one can consider plenty of synonyms to convey a similar meaning. Words like "lagging", "trailing" or "falling behind" are suitable alternatives. Additionally, phrases such as "out of sight", "in the rear" or "left in the dust" can effectively capture the notion of being far behind. These synonyms offer a variety of choices for writers and speakers to vividly depict the idea of being at a significant distance or disadvantage compared to others. By utilizing these alternatives, one can add depth and creativity to their expressions while maintaining the essence of being far behind.