master vs adult male

master and adult male both are nouns.

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

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

Other hypernyms of master include employer, man.

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

Other hypernyms of master include man, head, head teacher, principal, school principal.

master (noun)	adult male (noun)
an original creation (i.e., an audio recording) from which copies can be made	an adult person who is male (as opposed to a woman)
key that secures entrance everywhere
an artist of consummate skill
a combatant who is able to defeat rivals
an authority qualified to teach apprentices
directs the work of others
a person who has general authority over others
someone who holds a master's degree from academic institution
presiding officer of a school
an officer who is licensed to command a merchant ship

master (adjective)	adult male (adjective)
most important element

master (verb)	adult male (verb)
have a firm understanding or knowledge of; be on top of
be or become completely proficient or skilled in
get on top of; deal with successfully
have dominance or the power to defeat over