"Acting as though" is a common phrase used to imply that someone is pretending or behaving in a manner that is not true to their nature or character. However, there are many alternative ways to convey this sentiment through the use of synonyms. For instance, you could use "feigning," "pretending," "putting on a front," "faking," or "playing a role." Each of these synonyms carries a slightly different connotation that can help to emphasize the particular aspect of pretending being described. By exploring different options for expressing this idea, you can add depth and complexity to your language and enhance the overall impact of your writing or speech.