eldorado vs El Dorado

eldorado and El Dorado both are nouns.

Word	Noun	Adjective	Verb	Adverb
eldorado	Yes	No	No	No
El Dorado	Yes	No	No	No

As nouns, eldorado and El Dorado are synonyms defined as:

eldorado and El Dorado: an imaginary place of great wealth and opportunity; sought in South America by 16th-century explorers

eldorado (noun)	El Dorado (noun)
an imaginary place of great wealth and opportunity; sought in South America by 16th-century explorers	an imaginary place of great wealth and opportunity; sought in South America by 16th-century explorers