testiere vs armour plate

testiere and armour plate both are nouns.

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

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

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

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

testiere (noun)	armour plate (noun)
medieval plate armor to protect a horse's head	specially hardened steel plate used to protect fortifications or vehicles from enemy fire