pin-up vs woman

pin-up and woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
pin-up	Yes	No	No	No
woman	Yes	No	No	No

As nouns, woman is a hypernym of pin-up; that is, woman is a word with a broader meaning than pin-up:

Other hypernyms of pin-up include photographer's model, adult female.

pin-up (noun)	woman (noun)
a very pretty girl who works as a photographer's model	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