The antonyms for the phrase "starts back" are plentiful, as there are many words that convey the opposite meaning of starting back. Some possible antonyms might include words like advance, move forward, proceed, continue, press on, or forge ahead. Each of these words conveys a sense of forward motion and progress in the context of an activity or action. Conversely, starting back implies a sense of hesitation, uncertainty, or reticence about proceeding. By understanding the antonyms of "starts back," we can better appreciate the importance of pushing forward and staying committed to our goals, even in the face of challenges and setbacks.