ring mail vs body armour

ring mail and body armour both are nouns.

Word	Noun	Adjective	Verb	Adverb
ring mail	Yes	No	No	No
body armour	Yes	No	No	No

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

Other hypernyms of ring mail include body armor, cataphract, coat of mail, suit of armor, suit of armour.

ring mail (noun)	body armour (noun)
(Middle Ages) flexible armor made of interlinked metal rings	armor that protects the wearer's whole body