lollipop lady vs woman

lollipop lady and woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
lollipop lady	Yes	No	No	No
woman	Yes	No	No	No

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

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

Other hypernyms of lollipop lady include crossing guard, adult female.

lollipop lady (noun)	woman (noun)
a woman hired to help children cross a road safely near a school	women as a class
	an adult female person (as opposed to a man)
	a female person who plays a significant role (wife or mistress or girlfriend) in the life of a particular man