armor vs body armor

armor and body armor both are nouns.

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

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

armor (noun)	body armor (noun)
tough more-or-less rigid protective covering of an animal or plant	armor that protects the wearer's whole body
protective covering made of metal and used in combat
a military unit consisting of armored fighting vehicles

armor (verb)	body armor (verb)
equip with armor