signore vs adult male

signore and adult male both are nouns.

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

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

signore: an Italian title of respect for a man; equivalent to the English `sir'; used separately (not prefixed to his name)
adult male: an adult person who is male (as opposed to a woman)

Other hypernyms of signore include man.

signore (noun)	adult male (noun)
an Italian title of respect for a man; equivalent to the English `sir'; used separately (not prefixed to his name)	an adult person who is male (as opposed to a woman)