The phrase "hear of" commonly refers to becoming aware of something. However, there are various synonyms that can be used to express a similar meaning. For instance, "learn of" can be used to indicate acquiring knowledge about something. "Discover" implies finding out about something that was previously unknown. "Come across" or "encounter" suggest stumbling upon something unexpectedly. "Perceive" or "discern" indicate becoming aware of something through observation or insight. "Be informed" implies receiving information or news about something. By using these synonyms, writers and speakers can add variety and interest to their language, and convey their messages more effectively.