gallant vs adult male

gallant and adult male both are nouns.

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

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

Other hypernyms of gallant include man.

gallant (noun)	adult male (noun)
a man who attends or escorts a woman	an adult person who is male (as opposed to a woman)
a man who is much concerned with his dress and appearance

gallant (adjective)	adult male (adjective)
unflinching in battle or action
being attentive to women like an ideal knight
having or displaying great dignity or nobility
lively and spirited