There are several synonyms for the phrase "be discovered", including "be found", "be uncovered", "be revealed", "be exposed", and "be detected". All of these phrases suggest that something previously unknown or hidden has been revealed or brought to light. "Be found" implies that something was lost or missing and has now been located. "Be uncovered" suggests that something was hidden or covered up and has now been revealed. "Be revealed" and "be exposed" both suggest that something was unknown or secret and has now been made public. "Be detected" implies that something was hidden but has now been discovered through careful examination or investigation.