byrnie vs hauberk

byrnie and hauberk both are nouns.

Word	Noun	Adjective	Verb	Adverb
byrnie	Yes	No	No	No
hauberk	Yes	No	No	No

As nouns, byrnie and hauberk are synonyms defined as:

byrnie and hauberk: a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor

byrnie (noun)	hauberk (noun)
a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor	a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor