There are various synonyms for the term "try to overhear." One such term is "eavesdrop," which is defined as secretly listening to a conversation without permission. Another synonym is "listen in," which is a similar act of secretly listening to a conversation nearby. One could also use the term "spy" to describe the act of trying to overhear information. "Gather intel" is another similar term that could apply in contexts where one is trying to obtain information about a particular topic. In any case, it is important to consider the ethical implications of trying to overhear conversations, as it can be seen as intrusive or even illegal in certain circumstances.