tart vs white slave

tart and white slave both are nouns.

Word	Noun	Adjective	Verb	Adverb
tart	Yes	Yes	No	No
white slave	Yes	No	No	No

As nouns, white slave is a hyponym of tart; that is, white slave is a word with a more specific, narrower meaning than tart:

tart (noun)	white slave (noun)
a small open pie with a fruit filling	a woman sold into prostitution
a pastry cup with a filling of fruit or custard and no top crust
a woman who engages in sexual intercourse for money

tart (adjective)	white slave (adjective)
tasting sour like a lemon
harsh