Power serve is a term often used in the world of tennis, referring to a serve that is delivered with a high level of speed and force. However, there are several other synonyms that can be used to express the same idea. These include terms like "hard serve," "fast serve," "big serve," and "heavy serve." Each of these options conveys the same general idea of a strong and forceful serve that is difficult for an opponent to return. Whether you prefer to use power serve or one of its synonyms, they all share the same aim of helping to gain an advantage in a game of tennis.