Esquire vs adult male

Esquire and adult male both are nouns.

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

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

Esquire: a title of respect for a member of the English gentry ranking just below a knight; placed after the name
adult male: an adult person who is male (as opposed to a woman)

Other hypernyms of Esquire include man.

Esquire (noun)	adult male (noun)
a title of respect for a member of the English gentry ranking just below a knight; placed after the name	an adult person who is male (as opposed to a woman)