lady of pleasure vs woman

lady of pleasure and woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
lady of pleasure	Yes	No	No	No
woman	Yes	No	No	No

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

Other hypernyms of lady of pleasure include adult female.

lady of pleasure (noun)	woman (noun)
a woman who engages in sexual intercourse for money	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