The term "x-outing" can mean different things depending on the context. In terms of computer software, it could refer to the act of closing a window or application. Alternatively, it might pertain to crossing out or eliminating something, like a name on a list. In that sense, some possible synonyms for "x-outing" could be deleting, canceling, or striking out. Similarly, in a social context, "x-outing" may refer to a group activity or event. Here, possible synonyms could include excursion, expedition, or outing. In any case, the context in which "x-outing" is used will determine the most appropriate synonym.