visor vs armor plating

visor and armor plating both are nouns.

Word	Noun	Adjective	Verb	Adverb
visor	Yes	No	No	No
armor plating	Yes	No	No	No

As nouns, armor plating is a hypernym of visor; that is, armor plating is a word with a broader meaning than visor:

visor: a piece of armor plate (with eye slits) fixed or hinged to a medieval helmet to protect the face
armor plating: specially hardened steel plate used to protect fortifications or vehicles from enemy fire

Other hypernyms of visor include armor plate, armour plate, plate armor, plate armour.

visor (noun)	armor plating (noun)
a brim that projects to the front to shade the eyes	specially hardened steel plate used to protect fortifications or vehicles from enemy fire
a piece of armor plate (with eye slits) fixed or hinged to a medieval helmet to protect the face