hero vs adult male

hero and adult male both are nouns.

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

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

hero: a person distinguished by exceptional courage and nobility and strength
adult male: an adult person who is male (as opposed to a woman)

Other hypernyms of hero include leader, man.

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

hero: (classical mythology) a being of great strength and courage celebrated for bold exploits; often the offspring of a mortal and a god
adult male: an adult person who is male (as opposed to a woman)

Other hypernyms of hero include mythical being, man.

hero (noun)	adult male (noun)
the principal character in a play or movie or novel or poem	an adult person who is male (as opposed to a woman)
a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
a person distinguished by exceptional courage and nobility and strength
someone who fights for a cause
(classical mythology) a being of great strength and courage celebrated for bold exploits; often the offspring of a mortal and a god