ejaculator vs adult male

ejaculator and adult male both are nouns.

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

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

Other hypernyms of ejaculator include man.

ejaculator (noun)	adult male (noun)
a speaker who utters a sudden exclamation	an adult person who is male (as opposed to a woman)
a man who ejaculates semen