escutcheon vs protective cover

escutcheon and protective cover both are nouns.

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

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

escutcheon: a flat protective covering (on a door or wall etc) to prevent soiling by dirty fingers
protective cover: a covering that is intend to protect from damage or injury

Other hypernyms of escutcheon include protection, protective covering.

escutcheon (noun)	protective cover (noun)
a shield; especially one displaying a coat of arms	a covering that is intend to protect from damage or injury
(nautical) a plate on a ship's stern on which the name is inscribed
a flat protective covering (on a door or wall etc) to prevent soiling by dirty fingers