Lake Leman vs Lake Geneva

Lake Leman and Lake Geneva both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lake Leman	Yes	No	No	No
Lake Geneva	Yes	No	No	No

As nouns, Lake Leman and Lake Geneva are synonyms defined as:

Lake Leman and Lake Geneva: a lake between southwestern Switzerland and France that is crossed from east to west by the Rhone

Lake Leman (noun)	Lake Geneva (noun)
a lake between southwestern Switzerland and France that is crossed from east to west by the Rhone	a lake between southwestern Switzerland and France that is crossed from east to west by the Rhone