ring armor vs habergeon

ring armor and habergeon both are nouns.

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

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

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

Other hyponyms of ring armor include brigandine, byrnie, hauberk, gusset, voider.

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