habergeon vs chain armour

habergeon and chain armour both are nouns.

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

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

habergeon: (Middle Ages) a light sleeveless coat of chain mail worn under the hauberk
chain armour: (Middle Ages) flexible armor made of interlinked metal rings

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

habergeon (noun)	chain armour (noun)
(Middle Ages) a light sleeveless coat of chain mail worn under the hauberk	(Middle Ages) flexible armor made of interlinked metal rings