Lord vs adult male

Lord and adult male both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lord	Yes	No	No	No
adult male	Yes	No	No	No

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

Other hypernyms of Lord include male aristocrat, man.

Lord (noun)	adult male (noun)
a titled peer of the realm	an adult person who is male (as opposed to a woman)
terms referring to the Judeo-Christian God