bracer vs protective cover

bracer and protective cover both are nouns.

Word	Noun	Adjective	Verb	Adverb
bracer	Yes	No	No	No
protective cover	Yes	No	No	No

As nouns, protective cover is a hypernym of bracer; that is, protective cover is a word with a broader meaning than bracer:

bracer: a protective covering for the wrist or arm that is used in archery and fencing and other sports
protective cover: a covering that is intend to protect from damage or injury

Other hypernyms of bracer include protection, protective covering.

bracer (noun)	protective cover (noun)
a tonic or restorative (especially a drink of liquor)	a covering that is intend to protect from damage or injury
a protective covering for the wrist or arm that is used in archery and fencing and other sports