brassard vs armour plate

brassard and armour plate both are nouns.

Word	Noun	Adjective	Verb	Adverb
brassard	Yes	No	No	No
armour plate	Yes	No	No	No

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

brassard: armor plate that protects the arm
armour plate: specially hardened steel plate used to protect fortifications or vehicles from enemy fire

Other hypernyms of brassard include armor plate, armor plating, plate armor, plate armour.

brassard (noun)	armour plate (noun)
armor plate that protects the arm	specially hardened steel plate used to protect fortifications or vehicles from enemy fire