greave vs armor plating

greave and armor plating both are nouns.

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

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

greave: armor plate that protects legs below the knee
armor plating: specially hardened steel plate used to protect fortifications or vehicles from enemy fire

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

greave (noun)	armor plating (noun)
armor plate that protects legs below the knee	specially hardened steel plate used to protect fortifications or vehicles from enemy fire