Broca's center vs Broca's convolution

Broca's center and Broca's convolution both are nouns.

Word	Noun	Adjective	Verb	Adverb
Broca's center	Yes	No	No	No
Broca's convolution	Yes	No	No	No

As nouns, Broca's center and Broca's convolution are synonyms defined as:

Broca's center and Broca's convolution: the motor speech center in the left hemisphere of the brain in most people

Other synonyms of Broca's center include Broca's area, Broca's gyrus, convolution of Broca.

Broca's center (noun)	Broca's convolution (noun)
the motor speech center in the left hemisphere of the brain in most people	the motor speech center in the left hemisphere of the brain in most people