countryman vs adult male

countryman and adult male both are nouns.

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

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

Other hypernyms of countryman include compatriot, man.

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

Other hypernyms of countryman include man, rustic.

countryman (noun)	adult male (noun)
a man from your own country	an adult person who is male (as opposed to a woman)
a man who lives in the country and has country ways