coat of mail vs cataphract

coat of mail and cataphract both are nouns.

Word	Noun	Adjective	Verb	Adverb
coat of mail	Yes	No	No	No
cataphract	Yes	No	No	No

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

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

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

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