Earl Marshal vs peer

Earl Marshal and peer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Earl Marshal	Yes	No	No	No
peer	Yes	No	Yes	No

As nouns, peer is a hypernym of Earl Marshal; that is, peer is a word with a broader meaning than Earl Marshal:

Earl Marshal: an officer of the English peerage who organizes royal processions and other ceremonies
peer: a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage

Earl Marshal (noun)	peer (noun)
an officer of the English peerage who organizes royal processions and other ceremonies	a person who is of equal standing with another in a group
	a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage

Earl Marshal (verb)	peer (verb)
	look searchingly