plate armor vs body armor

plate armor and body armor both are nouns.

Word	Noun	Adjective	Verb	Adverb
plate armor	Yes	No	No	No
body armor	Yes	No	No	No

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

plate armor: a historical type of personal armor made from iron or steel plates, which superseded mail during the 14th century.
body armor: armor that protects the wearer's whole body

Other hypernyms of plate armor include body armour, cataphract, coat of mail, suit of armor, suit of armour.

plate armor (noun)	body armor (noun)
specially hardened steel plate used to protect fortifications or vehicles from enemy fire	armor that protects the wearer's whole body
a historical type of personal armor made from iron or steel plates, which superseded mail during the 14th century.