The Big Five personality traits are Openness to Experience, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. Agreeableness is not a trait in the Big Five model.

Borderline Personality Disorder is characterized by a pattern of unstable relationships, impulsivity, and emotional dysregulation.

Schizophrenia is characterized by a combination of hallucinations, delusions, disorganized speech, and negative symptoms.

Depression is characterized by a combination of symptoms including anhedonia, fatigue, insomnia, weight loss, and other physical and emotional changes.

A phobia is a persistent and irrational fear of a specific object or situation.

Defense mechanisms are unconscious mental processes that protect the individual from anxiety or distress. Common defense mechanisms include repression, projection, rationalization, displacement, and sublimation.

Obsessive-Compulsive Disorder is characterized by recurrent and intrusive thoughts, images, or impulses that cause significant distress or impairment.

Euphoria is not a symptom of post-traumatic stress disorder (PTSD). Flashbacks, nightmares, avoidance, and hypervigilance are common symptoms of PTSD.

Narcissistic Personality Disorder is characterized by a persistent pattern of grandiosity, need for admiration, and lack of empathy.

Generalized anxiety disorder (GAD) is characterized by a combination of symptoms including excessive worry, muscle tension, fatigue, difficulty concentrating, and other physical and emotional changes.

Borderline Personality Disorder is characterized by a persistent pattern of self-destructive behavior, impulsivity, and difficulty controlling emotions.

Social phobia is characterized by a combination of symptoms including fear of being judged or embarrassed in social situations, avoidance of social situations, and physical symptoms such as sweating, blushing, or trembling.

Antisocial Personality Disorder is characterized by a persistent pattern of manipulation, deceit, and exploitation of others.

Obsessive-compulsive disorder (OCD) is characterized by a combination of symptoms including obsessive thoughts, compulsive behaviors, anxiety, depression, and other physical and emotional changes.

Generalized Anxiety Disorder is characterized by a persistent pattern of excessive worry and anxiety about a variety of topics.