DoI vs Interior

DoI and Interior both are nouns.

Word	Noun	Adjective	Verb	Adverb
DoI	Yes	No	No	No
Interior	Yes	No	No	No

As nouns, DoI and Interior are synonyms defined as:

DoI and Interior: the United States federal department charged with conservation and the development of natural resources; created in 1849

Other synonyms of DoI include Department of the Interior, Interior Department.

DoI (noun)	Interior (noun)
the United States federal department charged with conservation and the development of natural resources; created in 1849	the United States federal department charged with conservation and the development of natural resources; created in 1849