Gaining strength is a phrase that implies growth, improvement, and an increased level of power. There are several synonyms for it, such as getting stronger, building up strength, developing power, and enhancing vigor. Other options include increasing stamina, boosting endurance, augmenting energy, and ameliorating muscularity. In addition, one can use terms like enhancing potency, heightening might, reinforcing resilience, and fortifying vigor. When used to describe physical fitness, strengthening can also mean toning muscles, improving flexibility, and increasing mobility. No matter which synonym is used, gaining strength is a positive and empowering concept that implies progress.