front-stall vs plate armour

front-stall and plate armour both are nouns.

Word	Noun	Adjective	Verb	Adverb
front-stall	Yes	No	No	No
plate armour	Yes	No	No	No

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

front-stall: medieval plate armor to protect a horse's head
plate armour: specially hardened steel plate used to protect fortifications or vehicles from enemy fire

Other hypernyms of front-stall include armor plate, armor plating, armour plate, plate armor.

front-stall (noun)	plate armour (noun)
medieval plate armor to protect a horse's head	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	a historical type of personal armor made from iron or steel plates, which superseded mail during the 14th century.