crisis vs Dunkirk

crisis and Dunkirk both are nouns.

Word	Noun	Adjective	Verb	Adverb
crisis	Yes	No	No	No
Dunkirk	Yes	No	No	No

As nouns, Dunkirk is a hyponym of crisis; that is, Dunkirk is a word with a more specific, narrower meaning than crisis:

crisis: an unstable situation of extreme danger or difficulty
Dunkirk: a crisis in which a desperate effort is the only alternative to defeat

Other hyponyms of crisis include exigency, critical point, crossroads, juncture, depression, economic crisis, slump.

crisis (noun)	Dunkirk (noun)
a crucial stage or turning point in the course of something	an amphibious evacuation in World War II (1940) when 330,000 Allied troops had to be evacuated from the beaches in northern France in a desperate retreat under enemy fire
an unstable situation of extreme danger or difficulty	a seaport in northern France on the North Sea; scene of the evacuation of British forces in 1940 during World War II
	a crisis in which a desperate effort is the only alternative to defeat