The word "out-dating" refers to something that is outdated or no longer relevant. Some synonyms for this term include obsolete, antiquated, old-fashioned, passe, and archaic. These words all refer to something that may have once been popular or useful but is now considered outdated and no longer in use. Other synonyms for "out-dating" include outmoded, unfashionable, behind the times, and passe. These words can be used to describe anything from technology and fashion to ideas and attitudes that are no longer relevant or current. By using these synonyms, we can effectively describe something that has fallen out of favor or lost its relevance over time.