lollipop woman vs adult female

lollipop woman and adult female both are nouns.

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

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

lollipop woman: a woman hired to help children cross a road safely near a school
adult female: an adult female person (as opposed to a man)

Other hypernyms of lollipop woman include crossing guard, woman.

lollipop woman (noun)	adult female (noun)
a woman hired to help children cross a road safely near a school	an adult female person (as opposed to a man)