bulletproof vest vs body armor

bulletproof vest and body armor both are nouns.

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

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

Other hypernyms of bulletproof vest include body armour, cataphract, coat of mail, suit of armor, suit of armour, vest, waistcoat.

bulletproof vest (noun)	body armor (noun)
a vest capable of resisting the impact of a bullet	armor that protects the wearer's whole body