habergeon vs chain mail

habergeon and chain mail both are nouns.

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

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

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

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

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