breadth index vs cephalic index

breadth index and cephalic index both are nouns.

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

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

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

Other synonyms of breadth index include cranial index.

breadth index (noun)	cephalic 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