tart vs street girl

tart and street girl both are nouns.

Word	Noun	Adjective	Verb	Adverb
tart	Yes	Yes	No	No
street girl	Yes	No	No	No

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

tart (noun)	street girl (noun)
a small open pie with a fruit filling	a prostitute who attracts customers by walking the streets
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)	street girl (adjective)
tasting sour like a lemon
harsh