Palliator

Noun

1. An apologist; one who justifies or excuses atrocities by citing extenuating circumstances or positive aspects.
2. Someone or something that palliates; A person or thing that soothes or reduces difficulties.
3. A medical professional who provides palliative care.
4. A device that allows a patient to control the amount of pain medication that is added into an intravenous drip; infusion pump.