street girl vs tart

street girl and tart both are nouns.

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

As nouns, tart is a hypernym of street girl; that is, tart is a word with a broader meaning than street girl:

street girl (noun)	tart (noun)
a prostitute who attracts customers by walking the streets	a small open pie with a fruit filling
	a pastry cup with a filling of fruit or custard and no top crust
	a woman who engages in sexual intercourse for money

street girl (adjective)	tart (adjective)
	tasting sour like a lemon
	harsh