Stereotyped behavior is a repetitive pattern of actions, thoughts, or expressions that often results from a lack of flexibility or adaptability. Synonyms for this term include rigid behavior, set behavior, fixed behavior, unvarying behavior, inflexible behavior, and routine behavior. Stereotyped behavior may manifest itself in a variety of ways, such as excessive hand-washing, obsessive counting, or strict adherence to daily routines. In some cases, such behavior can be a symptom of underlying mental health conditions such as obsessive-compulsive disorder (OCD) or autism spectrum disorder (ASD). Synonyms for stereotyped behavior can help us better understand and identify this pattern of behavior in ourselves and others, and develop strategies for managing it.