lobster tart vs tart

lobster tart and tart both are nouns.

Word	Noun	Adjective	Verb	Adverb
lobster tart	Yes	No	No	No
tart	Yes	Yes	No	No

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

lobster tart (noun)	tart (noun)
a pastry shell filled with cooked lobster	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

lobster tart (adjective)	tart (adjective)
	tasting sour like a lemon
	harsh