Being fair is an important trait, whether in our personal or professional lives. It means treating everyone equally and impartially, without any discrimination or bias. In order to express this idea, there are many synonyms that can be used instead of "be fair." For instance, you could say, "be just," "be unbiased," "be equitable," or "be objective." Other possible synonyms include "be even-handed," "be impartial," "be honest," or "show integrity." All of these words convey the sense of fairness and impartiality that is fundamental to building trust and respect in our relationships and society as a whole.