fauld vs plate armour

fauld and plate armour both are nouns.

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

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

fauld: a piece of armor plate below the breastplate
plate armour: specially hardened steel plate used to protect fortifications or vehicles from enemy fire

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

fauld (noun)	plate armour (noun)
a piece of armor plate below the breastplate	specially hardened steel plate used to protect fortifications or vehicles from enemy fire
	a historical type of personal armor made from iron or steel plates, which superseded mail during the 14th century.