hauberk vs ring armor

hauberk and ring armor both are nouns.

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

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

hauberk: a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor
ring armor: (Middle Ages) flexible armor made of interlinked metal rings

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

hauberk (noun)	ring armor (noun)
a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor	(Middle Ages) flexible armor made of interlinked metal rings