Nouns

(n)frontlet, frontalan adornment worn on the forehead
(n)frontala drapery that covers the front of an altar
(n)facade, frontage, frontalthe face or front of a building

Adjectives

(s)frontalbelonging to the front part“a frontal appendage”
(a)frontalof or relating to the front of an advancing mass of air“frontal rainfall”
(s)frontal, head-onmeeting front to front“a frontal attack”, “a head-on collision”
(s)frontalof or adjacent to the forehead or frontal bone“the frontal lobes”