partridge vs USA

partridge and USA both are nouns.

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

partridge (noun)	USA (noun)
small Old World gallinaceous game birds	the army of the United States of America; the agency that organizes and trains soldiers for land warfare
a popular North American game bird; named for its call	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
valued as a game bird in eastern United States and Canada
heavy-bodied small-winged South American game bird resembling a gallinaceous bird but related to the ratite birds
flesh of either quail or grouse