USA vs CT

USA and CT both are nouns.

Word	Noun	Adjective	Verb	Adverb
USA	Yes	No	No	No
CT	Yes	No	No	No

USA (noun)	CT (noun)
the army of the United States of America; the agency that organizes and trains soldiers for land warfare	a method of examining body organs by scanning them with X rays and using a computer to construct a series of cross-sectional scans along a single axis
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 New England state; one of the original 13 colonies