frontal vs frontispiece

frontal and frontispiece both are nouns.

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

As nouns, frontispiece is a hyponym of frontal; that is, frontispiece is a word with a more specific, narrower meaning than frontal:

frontal (noun)	frontispiece (noun)
an adornment worn on the forehead	front illustration facing the title page of a book
a drapery that covers the front of an altar	an ornamental facade
the face or front of a building

frontal (adjective)	frontispiece (adjective)
of or relating to the front of an advancing mass of air
meeting front to front
belonging to the front part
of or adjacent to the forehead or frontal bone