"High mark time" is a military term used to refer to a marching step in which troops lift their legs up high to mark time while staying in place. Some synonyms for this term include "halt step," "standing in place," and "standing still." It can also be referred to as "pause step," "mark time," or simply "marking time." This step is often used during military parades or other formal events to maintain the formation and disciplined look of the marching troops. Using synonyms for "high mark time" can help provide variety in writing and communication while conveying the same meaning.