os frontale vs frontal bone

os frontale and frontal bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
os frontale	Yes	No	No	No
frontal bone	Yes	No	No	No

As nouns, os frontale and frontal bone are synonyms defined as:

os frontale and frontal bone: the large cranial bone forming the front part of the cranium: includes the upper part of the orbits

Other synonyms of os frontale include forehead.

os frontale (noun)	frontal bone (noun)
the large cranial bone forming the front part of the cranium: includes the upper part of the orbits	the large cranial bone forming the front part of the cranium: includes the upper part of the orbits