First World War vs Ypres

First World War and Ypres both are nouns.

Word	Noun	Adjective	Verb	Adverb
First World War	Yes	No	No	No
Ypres	Yes	No	No	No

First World War (noun)	Ypres (noun)
a war between the allies (Russia, France, British Empire, Italy, United States, Japan, Rumania, Serbia, Belgium, Greece, Portugal, Montenegro) and the Central Powers (Germany, Austria-Hungary, Turkey, Bulgaria) from 1914 to 1918	battle in World War I (1914); heavy but indecisive fighting as the Allies and the Germans both tried to break through the lines of the others
	battle in World War I (1915); Germans wanted to try chlorine (a toxic yellow gas) as a weapon and succeeded in taking considerable territory from the Allied salient
	battle in World War I (1917); an Allied offensive which eventually failed because tanks bogged down in the waterlogged soil of Flanders; Germans introduced mustard gas which interfered with the Allied artillery