"As one" can be used to describe a state of unity or harmony in different contexts. There are several synonyms for the phrase, including "together," "in unison," "as a whole," and "in concert." Each of these phrases carries a slightly different connotation, but they all convey a sense of cohesion and cooperation. "Together" suggests a coming together of individuals or ideas, while "in unison" emphasizes the idea of working together towards a common goal. "As a whole" emphasizes the idea of all parts contributing to a greater whole, and "in concert" conveys the sense of working together towards a specific event or outcome. By using these synonyms, writers and speakers can add variety and precision to their language while still conveying the idea of unity or harmony.