General synonyms:
* Cliché: A worn-out, overused phrase or idea.
* Generalization: A broad statement that applies to a whole group, often without considering individual differences.
* Preconception: A preconceived notion or opinion, often negative or unfair.
* Prejudice: A preconceived opinion about a person or group, usually negative and based on insufficient information.
* Assumption: Something taken for granted without proof.
* Label: A word or phrase used to categorize or identify something, often in a simplistic or superficial way.
* Prototype: A typical example of a particular type of person or thing.
More specific synonyms:
* Archetype: A universal, recurring symbol or pattern of behavior.
* Caricature: An exaggerated portrayal of someone or something, often in a humorous or satirical way.
* Image: A mental picture or representation, often simplified or distorted.
* Schema: A mental framework or structure that helps us organize information and understand the world.
* Social construct: A concept or category that is created and maintained by society, often reflecting cultural beliefs and values.
* Stigma: A mark of disgrace or shame associated with a particular group or characteristic.
* Trope: A recurring device or theme in literature, film, or other forms of art.
The specific word you choose will depend on the context and the nuance you want to convey.