what is the difference between a therapist and a psychologist?
1 A Psychologist has a Psychology Degree and therefore is specialised in understanding the functioning of the mind. They can work clinically with similar patients as Psychiatrists, or do other things like working in Human Resources, Marketing, etc.  A Therapist uses talking therapies to treat mental health problems.
A therapist is a general term that includes many different types of mental health workers. He is a professional who provides counseling to his clients who are in a mental strife and want to come over the problem. A social worker, clinical psychologist, or even a counselor may be referred to as a therapist.