loose woman vs adult female

loose woman and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
loose woman	Yes	No	No	No
adult female	Yes	No	No	No

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

Other hypernyms of loose woman include adulterer, fornicator, woman.

loose woman (noun)	adult female (noun)
a woman adulterer	an adult female person (as opposed to a man)