The Hague vs 's Gravenhage

The Hague and 's Gravenhage both are nouns.

Word	Noun	Adjective	Verb	Adverb
The Hague	Yes	No	No	No
's Gravenhage	Yes	No	No	No

As nouns, The Hague and 's Gravenhage are synonyms defined as:

The Hague and 's Gravenhage: 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 Den Haag.

The Hague (noun)	's Gravenhage (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