Lake Eyre vs Eyre

Lake Eyre and Eyre both are nouns.

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

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

Lake Eyre and Eyre: a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent

Lake Eyre (noun)	Eyre (noun)
a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent	a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent