ianfu vs woman of the street

ianfu and woman of the street both are nouns.

Word	Noun	Adjective	Verb	Adverb
ianfu	Yes	No	No	No
woman of the street	Yes	No	No	No

As nouns, woman of the street is a hypernym of ianfu; that is, woman of the street is a word with a broader meaning than ianfu:

ianfu: a woman forced into prostitution for Japanese servicemen during World War II
woman of the street: a woman who engages in sexual intercourse for money

ianfu (noun)	woman of the street (noun)
a woman forced into prostitution for Japanese servicemen during World War II	a woman who engages in sexual intercourse for money