zygomatic vs zygomatic arch

zygomatic and zygomatic arch both are nouns.

Word	Noun	Adjective	Verb	Adverb
zygomatic	Yes	Yes	No	No
zygomatic arch	Yes	No	No	No

zygomatic (noun)	zygomatic arch (noun)
the arch of bone beneath the eye that forms the prominence of the cheek	the slender arch formed by the temporal process of the cheekbone that bridges to the zygomatic process of the temporal bone

zygomatic (adjective)	zygomatic arch (adjective)
of or relating to the cheek region of the face