"Came aboard" refers to someone joining a team or group, but there are various other ways to express this action. Some synonyms for "came aboard" include "joined in," "hopped on," "became part of," "enlisted," "signed up," "joined forces," and "got on board." These phrases help to add variety to one's writing or speech, and they offer alternative ways to convey the same concept without repeating the same phrase over and over again. It's important to choose the right synonym for the context in which it is used to ensure clarity and effectiveness in communication.