False appearance refers to something that appears to be one thing, but is actually something else. There are several synonyms that can be used to express this concept. One such synonym is "pretense", which refers to falsely claiming or pretending to be something one is not. Another synonym for false appearance is "deception", which refers to the act of deliberately misleading or tricking someone into believing something that is not true. "Disguise" is another synonym that refers to concealing one's true identity or appearance in order to deceive someone. "Facade", "mask" and "cloak" are also synonyms that can be used to describe false appearances.