There are several synonyms for the phrase "bite the bullet" which is often used to refer to facing a difficult or unpleasant situation with courage or determination. One such synonym is "grin and bear it" which means to accept a difficult situation without complaining. Another synonym is "take the plunge" which refers to taking a risk or making a difficult decision. "Suck it up" is another synonym which means to endure a difficult situation without complaint. "Face the music" is also used to describe the act of confronting a situation, even if it may be unpleasant. Ultimately, all of these synonyms convey the idea that one must summon the courage to tackle difficult situations head on.