Healer
Part of speech: noun
Definition: Agent noun of heal; a person who heals, especially through faith.
Example sentence: Medical judgment can be taught - laboriously, in long periods of training - but it cannot be neatly handed over as the occasion demands it. It is the irreplaceable and untransferable contribution that the healer makes to the suffering individual who would be healed.
Therapist
Part of speech: noun
Definition: Someone who provides therapy, usually professionally.
Example sentence: Any therapist will tell you that when you're ready, you will come out. To be outed means you weren't ready.