I realize that during my searches Jeanoz has suggested the same term. However, I will agree with the asker in saying that there is a perhaps a difference between palliative and comfort care, that they are not necessarily synonyms. However many of the searches for "comofrt care"+Definition give the same or really similar definitions for palliative care. It is also common for the definition of one term to include the use of the other!

Here is some evidence in support of there being a difference :


http://legaldefinitions.co/comfort-care.html

Comfort care:

Medical care intended to provide relief from pain and discomfort, such as pain control drugs.


http://dictionary.babylon.com/comfort care/

NCI Dictionary

NCI Dictionary of Cancer Terms
Care given to improve the quality of lifeof patients who have a serious or life-threatening disease. The goal of comfort care is to prevent or treat as early as possible the symptoms of the disease, side effects caused by treatment of the disease, and psychological, social, and spiritual problems related to the disease or its treatment. Also called palliative care, supportive care, and symptom management.
A Service of the National Cancer Institute.


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Note added at 28 mins (2012-05-23 16:47:16 GMT)
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Perhaps as a matter of principle to differentiate as the original does, it might be perfectly correct to use "comfort care".