There are several synonyms for the phrase "was worthwhile" that can be used to convey an idea or experience that was valuable or rewarding. One possible synonym is "was beneficial," which indicates that something had a positive effect or was advantageous in some way. Another option is "was meaningful," suggesting that something had significance or importance beyond just a surface level experience. Additionally, "was fulfilling" could be used to describe an experience that provided a sense of accomplishment or satisfaction. Other potential related phrases could include "had merit," "was worth it," or "proved to be valuable." Each of these synonyms can be used to convey a similar sense of worth or significance as "was worthwhile".