husband vs adult male

husband and adult male both are nouns.

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

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

Other hypernyms of husband include man, better half, married person, mate, partner, spouse.

husband (noun)	adult male (noun)
a married man; a woman's partner in marriage	an adult person who is male (as opposed to a woman)

husband (verb)	adult male (verb)
use cautiously and frugally