SALT I vs treaty

SALT I and treaty both are nouns.

Word	Noun	Adjective	Verb	Adverb
SALT I	Yes	No	No	No
treaty	Yes	No	No	No

SALT I (noun)	treaty (noun)
the first treaty between the United States and the Union of Soviet Socialist Republics resulting from the Strategic Arms Limitation Talks	a written agreement between two states or sovereigns