frontal vs anterior

frontal and anterior both are nouns.

Word	Noun	Adjective	Verb	Adverb
frontal	Yes	Yes	No	No
anterior	Yes	Yes	No	No

frontal (noun)	anterior (noun)
an adornment worn on the forehead	a tooth situated at the front of the mouth
a drapery that covers the front of an altar
the face or front of a building

frontal (adjective)	anterior (adjective)
of or relating to the front of an advancing mass of air	of or near the head end or toward the front plane of a body
meeting front to front	earlier in time
belonging to the front part
of or adjacent to the forehead or frontal bone