Antiquating is a term that is used to describe something that becomes old-fashioned or outdated. There are several synonyms that can be used to describe this process. For example, you can use the words old-fashioned, outmoded, archaic, passe, and obsolete to describe something that is antiquating. These words all convey the idea that something is no longer relevant or useful in the modern world. Other words that can be used to describe the process of antiquating include phasing out, retiring, and discontinuing. Whatever the word you choose, the idea is the same: something that was once valuable and useful is no longer relevant in today's world.