Lake Baikal vs Baikal

Lake Baikal and Baikal both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lake Baikal	Yes	No	No	No
Baikal	Yes	No	No	No

As nouns, Lake Baikal and Baikal are synonyms defined as:

Lake Baikal and Baikal: the largest freshwater lake in Asia or Europe and the deepest lake in the world

Other synonyms of Lake Baikal include Baykal, Lake Baykal.

Lake Baikal (noun)	Baikal (noun)
the largest freshwater lake in Asia or Europe and the deepest lake in the world	the largest freshwater lake in Asia or Europe and the deepest lake in the world