U.S.A. vs inch

U.S.A. and inch both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.S.A.	Yes	No	No	No
inch	Yes	No	Yes	No

U.S.A. (noun)	inch (noun)
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 unit of length equal to one twelfth of a foot
	a unit of measurement for advertising space

U.S.A. (verb)	inch (verb)
	advance slowly, as if by inches