ring armor vs chain armor

ring armor and chain armor both are nouns.

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

As nouns, ring armor and chain armor are synonyms defined as:

ring armor and chain armor: (Middle Ages) flexible armor made of interlinked metal rings

Other synonyms of ring armor include chain armour, chain mail, mail, ring armour, ring mail.

ring armor (noun)	chain armor (noun)
(Middle Ages) flexible armor made of interlinked metal rings	(Middle Ages) flexible armor made of interlinked metal rings