cabalist vs fellow member

cabalist and fellow member both are nouns.

Word	Noun	Adjective	Verb	Adverb
cabalist	Yes	No	No	No
fellow member	Yes	No	No	No

As nouns, fellow member is a hypernym of cabalist; that is, fellow member is a word with a broader meaning than cabalist:

cabalist: a member of a cabal
fellow member: one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)

Other hypernyms of cabalist include member.

cabalist (noun)	fellow member (noun)
an expert who is highly skilled in obscure or difficult or esoteric matters	one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)
a member of a cabal