comfort woman vs fancy woman

comfort woman and fancy woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
comfort woman	Yes	No	No	No
fancy woman	Yes	No	No	No

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

comfort woman: a woman forced into prostitution for Japanese servicemen during World War II
fancy woman: a woman who engages in sexual intercourse for money

comfort woman (noun)	fancy woman (noun)
a woman forced into prostitution for Japanese servicemen during World War II	an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man
	a woman who engages in sexual intercourse for money