frontal bone vs os frontale

frontal bone and os frontale both are nouns.

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

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

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

Other synonyms of frontal bone include forehead.

frontal bone (noun)	os frontale (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