When someone is vain, they can be described in various different ways. Some synonyms for the phrase "is vain" include egotistical, self-centered, narcissistic, conceited, and self-absorbed. Being vain can be characterized by excessive pride in one's appearance or accomplishments, without any real substance underneath. Other terms for this kind of behavior might include being haughty, arrogant, boastful, or pompous. When someone is vain, they often put their own desires and needs above those of others, which can make them seem selfish or insensitive. However, there may also be underlying insecurities or fears driving this behavior that should be acknowledged and addressed.