blonde vs adult female

blonde and adult female both are nouns.

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

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

Other hypernyms of blonde include blond person, woman.

blonde (noun)	adult female (noun)
a light grayish yellow to near white	an adult female person (as opposed to a man)
a female person with fair skin and hair

blonde (adjective)	adult female (adjective)
being or having light colored skin and hair and usually blue or grey eyes