habergeon vs ring armour

habergeon and ring armour both are nouns.

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

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

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

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

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