amazon vs adult female

amazon and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
amazon	Yes	No	No	No
adult female	Yes	No	No	No

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

Other hypernyms of amazon include woman.

amazon (noun)	adult female (noun)
mainly green tropical American parrots	an adult female person (as opposed to a man)
a large strong and aggressive woman