The phrase "grows stronger" can be replaced by a variety of synonyms that convey a similar meaning. For instance, the phrase can be substituted by "flourishes", which implies growth and progression. Another possible synonym is "thrives", which indicates growth, vitality, and prosperity. "Blossoms" is also a suitable synonym, especially when used to describe the growth and development of a person or an idea. "Matures" is a more abstract synonym that implies growth and development over time. Other possible synonyms include "escalates", "amplifies", "magnifies", and "intensifies". Regardless of the chosen synonym, these words all point to growth and progress.