escutcheon vs buckler

escutcheon and buckler both are nouns.

Word	Noun	Adjective	Verb	Adverb
escutcheon	Yes	No	No	No
buckler	Yes	No	No	No

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

Other hypernyms of escutcheon include shield.

escutcheon (noun)	buckler (noun)
a shield; especially one displaying a coat of arms	armor carried on the arm to intercept blows
(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