baron vs peer

baron and peer both are nouns.

Word	Noun	Adjective	Verb	Adverb
baron	Yes	No	No	No
peer	Yes	No	Yes	No

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

baron: a British peer of the lowest rank
peer: a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage

baron (noun)	peer (noun)
a British peer of the lowest rank	a person who is of equal standing with another in a group
a very wealthy or powerful businessman	a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage
a nobleman (in various countries) of varying rank

baron (verb)	peer (verb)
	look searchingly