tart vs U.S.

tart and U.S. both are nouns.

Word	Noun	Adjective	Verb	Adverb
tart	Yes	Yes	No	No
U.S.	Yes	No	No	No

tart (noun)	U.S. (noun)
a small open pie with a fruit filling	the executive and legislative and judicial branches of the federal government of the United States
a pastry cup with a filling of fruit or custard and no top crust	North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
a woman who engages in sexual intercourse for money

tart (adjective)	U.S. (adjective)
tasting sour like a lemon
harsh