brigandine vs chain armour

brigandine and chain armour both are nouns.

Word	Noun	Adjective	Verb	Adverb
brigandine	Yes	No	No	No
chain armour	Yes	No	No	No

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

brigandine: a medieval coat of chain mail consisting of metal rings sewn onto leather or cloth
chain armour: (Middle Ages) flexible armor made of interlinked metal rings

Other hypernyms of brigandine include chain armor, chain mail, mail, ring armor, ring armour, ring mail.

brigandine (noun)	chain armour (noun)
a medieval coat of chain mail consisting of metal rings sewn onto leather or cloth	(Middle Ages) flexible armor made of interlinked metal rings