Kingdom of Belgium vs Belgique

Kingdom of Belgium and Belgique both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kingdom of Belgium	Yes	No	No	No
Belgique	Yes	No	No	No

As nouns, Kingdom of Belgium and Belgique are synonyms defined as:

Kingdom of Belgium and Belgique: a monarchy in northwestern Europe; headquarters for the European Union and for the North Atlantic Treaty Organization

Other synonyms of Kingdom of Belgium include Belgium.

Kingdom of Belgium (noun)	Belgique (noun)
a monarchy in northwestern Europe; headquarters for the European Union and for the North Atlantic Treaty Organization	a monarchy in northwestern Europe; headquarters for the European Union and for the North Atlantic Treaty Organization