Tarzan vs adult male

Tarzan and adult male both are nouns.

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

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

Tarzan: (sometimes used ironically) a man of great strength and agility (after the hero of a series of novels by Edgar Rice Burroughs)
adult male: an adult person who is male (as opposed to a woman)

Other hypernyms of Tarzan include man.

Tarzan (noun)	adult male (noun)
a man raised by apes who was the hero of a series of novels by Edgar Rice Burroughs	an adult person who is male (as opposed to a woman)
(sometimes used ironically) a man of great strength and agility (after the hero of a series of novels by Edgar Rice Burroughs)