Egyptian capital vs El Qahira

Egyptian capital and El Qahira both are nouns.

Word	Noun	Adjective	Verb	Adverb
Egyptian capital	Yes	No	No	No
El Qahira	Yes	No	No	No

As nouns, Egyptian capital and El Qahira are synonyms defined as:

Egyptian capital and El Qahira: the capital of Egypt and the largest city in Africa; a major port just to the south of the Nile delta; formerly the home of the Pharaohs

Other synonyms of Egyptian capital include Al Qahira, Cairo, capital of Egypt.

Egyptian capital (noun)	El Qahira (noun)
the capital of Egypt and the largest city in Africa; a major port just to the south of the Nile delta; formerly the home of the Pharaohs	the capital of Egypt and the largest city in Africa; a major port just to the south of the Nile delta; formerly the home of the Pharaohs