baron vs Lord

baron and Lord both are nouns.

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

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

Other hypernyms of baron include noble, nobleman.

baron (noun)	Lord (noun)
a British peer of the lowest rank	a titled peer of the realm
a very wealthy or powerful businessman	terms referring to the Judeo-Christian God
a nobleman (in various countries) of varying rank