Tangiers vs Tangier

Tangiers and Tangier both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tangiers	Yes	No	No	No
Tangier	Yes	No	No	No

As nouns, Tangiers and Tangier are synonyms defined as:

Tangiers and Tangier: a city of northern Morocco at the west end of the Strait of Gibraltar

Tangiers (noun)	Tangier (noun)
a city of northern Morocco at the west end of the Strait of Gibraltar	a city of northern Morocco at the west end of the Strait of Gibraltar