Vacillancy, or the tendency to waver or show indecisiveness, can be described with a variety of synonyms. Some alternatives to this word include uncertainty, hesitation, wavering, doubt, ambivalence, fluctuation, hesitation, faltering, hesitation, or dithering. Each of these synonyms conveys the sense of someone who is unsure or hesitant about a decision or action, and may be struggling to find a clear course of action. Whether expressed through the specific language of vacillancy or the many other synonyms available, this sense of indecisiveness can be a common challenge for many people in today's world.