U. S. Army vs AI

U. S. Army and AI both are nouns.

Word	Noun	Adjective	Verb	Adverb
U. S. Army	Yes	No	No	No
AI	Yes	No	No	No

U. S. Army (noun)	AI (noun)
the army of the United States of America; the agency that organizes and trains soldiers for land warfare	the introduction of semen into the oviduct or uterus by some means other than sexual intercourse
	the branch of computer science that deal with writing computer programs that can solve problems creatively
	an agency of the United States Army responsible for providing timely and relevant and accurate and synchronized intelligence to tactical and operational and strategic level commanders