There are a number of synonyms available for the phrase "was vested." One option might be "was endowed," which carries with it a sense of being given something valuable or important. Another possibility could be "was granted" or "was conferred," which both suggest that something has been officially bestowed upon a person or entity. Other options could include "was invested," which implies a sense of trust or confidence placed in someone or something, or "was secured," which suggests a sense of protection or safety. Ultimately, the choice of synonym will depend on the specific context in which the phrase is being used, as well as the desired tone and connotations.