Lord vs margrave

Lord and margrave both are nouns.

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

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

Lord: a titled peer of the realm
margrave: a German nobleman ranking above a count (corresponding in rank to a British marquess)

Lord (noun)	margrave (noun)
a titled peer of the realm	a German nobleman ranking above a count (corresponding in rank to a British marquess)
terms referring to the Judeo-Christian God	the military governor of a frontier province in medieval Germany