Al Qahira vs Egyptian capital

Al Qahira and Egyptian capital both are nouns.

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

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

Al Qahira and Egyptian capital: 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 Al Qahira include Cairo, capital of Egypt, El Qahira.

Al Qahira (noun)	Egyptian capital (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