coiffeur vs adult male

coiffeur and adult male both are nouns.

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

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

Other hypernyms of coiffeur include hairdresser, hairstylist, styler, stylist, man.

coiffeur (noun)	adult male (noun)
a man hairdresser	an adult person who is male (as opposed to a woman)