cephalic index vs breadth index

cephalic index and breadth index both are nouns.

Word	Noun	Adjective	Verb	Adverb
cephalic index	Yes	No	No	No
breadth index	Yes	No	No	No

As nouns, cephalic index and breadth index are synonyms defined as:

cephalic index and breadth index: ratio (in percent) of the maximum breadth to the maximum length of a skull

Other synonyms of cephalic index include cranial index.

cephalic index (noun)	breadth index (noun)
ratio (in percent) of the maximum breadth to the maximum length of a skull	ratio (in percent) of the maximum breadth to the maximum length of a skull