plate armor vs tuille

plate armor and tuille both are nouns.

Word	Noun	Adjective	Verb	Adverb
plate armor	Yes	No	No	No
tuille	Yes	No	No	No

As nouns, tuille is a hyponym of plate armor; that is, tuille is a word with a more specific, narrower meaning than plate armor:

plate armor: specially hardened steel plate used to protect fortifications or vehicles from enemy fire
tuille: armor plate that protects the hip and thigh

plate armor (noun)	tuille (noun)
specially hardened steel plate used to protect fortifications or vehicles from enemy fire	armor plate that protects the hip and thigh
a historical type of personal armor made from iron or steel plates, which superseded mail during the 14th century.