The Hague vs Den Haag

The Hague and Den Haag both are nouns.

Word	Noun	Adjective	Verb	Adverb
The Hague	Yes	No	No	No
Den Haag	Yes	No	No	No

As nouns, The Hague and Den Haag are synonyms defined as:

The Hague and Den Haag: the site of the royal residence and the de facto capital in the western part of the Netherlands; seat of the International Court of Justice

Other synonyms of The Hague include 's Gravenhage.

The Hague (noun)	Den Haag (noun)
the site of the royal residence and the de facto capital in the western part of the Netherlands; seat of the International Court of Justice	the site of the royal residence and the de facto capital in the western part of the Netherlands; seat of the International Court of Justice