lateral cerebral sulcus vs fissure of Sylvius

lateral cerebral sulcus and fissure of Sylvius both are nouns.

Word	Noun	Adjective	Verb	Adverb
lateral cerebral sulcus	Yes	No	No	No
fissure of Sylvius	Yes	No	No	No

As nouns, lateral cerebral sulcus and fissure of Sylvius are synonyms defined as:

lateral cerebral sulcus and fissure of Sylvius: the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres

Other synonyms of lateral cerebral sulcus include sulcus lateralis cerebri, Sylvian fissure.

lateral cerebral sulcus (noun)	fissure of Sylvius (noun)
the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres	the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres