zygomatic bone vs os zygomaticum

zygomatic bone and os zygomaticum both are nouns.

Word	Noun	Adjective	Verb	Adverb
zygomatic bone	Yes	No	No	No
os zygomaticum	Yes	No	No	No

As nouns, zygomatic bone and os zygomaticum are synonyms defined as:

zygomatic bone and os zygomaticum: the arch of bone beneath the eye that forms the prominence of the cheek

Other synonyms of zygomatic bone include cheekbone, jugal bone, malar, malar bone, zygomatic.

zygomatic bone (noun)	os zygomaticum (noun)
the arch of bone beneath the eye that forms the prominence of the cheek	the arch of bone beneath the eye that forms the prominence of the cheek