Is personality disorder the same as borderline personality disorder?

Yes,: borderline personality disorder is a type of personality disorder. there are others e.g. naricisstic personality disorder, dependent personality disorder etc.

Borderline: Borderline personality disorder already IS a personality disorder, in fact, one of several. Intense fear of abandonment, being manipulative, impulsivity, a tendency to think of people and things in all good or all bad terms, self mutilating behaviors, drug and alcohol abuse, sexual impulsivity, a profoundly disturb sense of self, and extreme emotional volatility.

BPD: Borderline is one of several Personality disorders.