There are numerous synonyms for the phrase "be one fate". Some of these include "share the same destiny", "have a common lot", "be joined in fate", "be in the same boat", "have a shared fate", "be doomed together", and "have a similar fate". These synonyms all convey the idea that two or more individuals are bound together by a common destiny or fate, and that whatever happens to one person will inevitably affect the others as well. This sense of shared fate can be comforting in times of hardship, as it allows individuals to draw strength and support from one another in the face of adversity.