masseur vs adult male

masseur and adult male both are nouns.

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

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

Other hypernyms of masseur include man, massager.

masseur (noun)	adult male (noun)
a male massager	an adult person who is male (as opposed to a woman)