There are several synonyms for the phrase "give a beating" that can be used in various situations. One of the most common terms is "beat up," which implies physical violence that often results in injury. Another possible synonym is "thrash," which emphasizes a severe and relentless beating. "Pound" is a similar term that can be used to describe a vigorous physical attack. In some cases, "assault" may be an appropriate substitute, especially in legal contexts. Other potential synonyms for "give a beating" include "maul," "batter," "pummel," and "rout." When choosing a synonym, it is important to consider the specific context and tone of the message being conveyed.