Emmet Fox was not a member of the Christian Science Church. We have already discussed how “membership” is irrelevant to the working of God, Science.
Here is a reading of his pamphlet “7 aspects of God” which is a treatise on how to use the 7 synonyms. These are identical to CS except for “Mind” which he calls “Intelligence”.
An associate of his became involved with founding Alcoholics Anonymous (AA) with Bill Wilson and as a result these synonyms are often studied to bring about sobriety.
No reference is given here to or about Mrs Eddy, it is likely that he picked them up from Emma Curtis Hopkins, a former associate of Mary Baker Eddy and her “Divine Science” system from where Emmet Fox came.