Great Mother vs Cybele

Great Mother and Cybele both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Mother	Yes	No	No	No
Cybele	Yes	No	No	No

As nouns, Great Mother and Cybele are synonyms defined as:

Great Mother and Cybele: great nature goddess of ancient Phrygia in Asia Minor; counterpart of Greek Rhea and Roman Ops

Other synonyms of Great Mother include Dindymene, Magna Mater, Mater Turrita.

Great Mother (noun)	Cybele (noun)
great nature goddess of ancient Phrygia in Asia Minor; counterpart of Greek Rhea and Roman Ops	great nature goddess of ancient Phrygia in Asia Minor; counterpart of Greek Rhea and Roman Ops