There are a number of synonyms for the term "strong strategy" that can be used to describe a well-planned and effective approach. One such synonym is "sound plan," which suggests a carefully considered and thoughtfully designed course of action. "Robust tactics" is another term that conveys strength, durability, and resilience, indicating that the strategy is capable of withstanding challenges and obstacles. "Effective methodology" is another synonym that emphasizes the practicality and usefulness of the strategy, indicating that it is well-suited to achieving specific goals and objectives. Other synonyms include "powerful approach," "winning formula," and "solid scheme," all of which suggest a strong, successful, and effective strategy.