shield vs scutcheon

shield and scutcheon both are nouns.

Word	Noun	Adjective	Verb	Adverb
shield	Yes	No	Yes	No
scutcheon	Yes	No	No	No

As nouns, scutcheon is a hyponym of shield; that is, scutcheon is a word with a more specific, narrower meaning than shield:

Other hyponyms of shield include escutcheon, pavis, pavise.

shield (noun)	scutcheon (noun)
hard outer covering or case of certain organisms such as arthropods and turtles	a shield; especially one displaying a coat of arms
armor carried on the arm to intercept blows	a flat protective covering (on a door or wall etc) to prevent soiling by dirty fingers
a protective covering or structure

shield (verb)	scutcheon (verb)
protect, hide, or conceal from danger or harm
hold back a thought or feeling about