Strait of Calais vs Strait of Dover

Strait of Calais and Strait of Dover both are nouns.

Word	Noun	Adjective	Verb	Adverb
Strait of Calais	Yes	No	No	No
Strait of Dover	Yes	No	No	No

As nouns, Strait of Calais and Strait of Dover are synonyms defined as:

Strait of Calais and Strait of Dover: the strait between the English Channel and the North Sea; shortest distance between England and the European continent

Other synonyms of Strait of Calais include Pas de Calais.

Strait of Calais (noun)	Strait of Dover (noun)
the strait between the English Channel and the North Sea; shortest distance between England and the European continent	the strait between the English Channel and the North Sea; shortest distance between England and the European continent