coat of mail vs body armour

coat of mail and body armour both are nouns.

Word	Noun	Adjective	Verb	Adverb
coat of mail	Yes	No	No	No
body armour	Yes	No	No	No

As nouns, coat of mail and body armour are synonyms defined as:

coat of mail and body armour: armor that protects the wearer's whole body

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

coat of mail (noun)	body armour (noun)
armor that protects the wearer's whole body	armor that protects the wearer's whole body