main office vs mukataa

main office and mukataa both are nouns.

Word	Noun	Adjective	Verb	Adverb
main office	Yes	No	No	No
mukataa	Yes	No	No	No

As nouns, mukataa is a hyponym of main office; that is, mukataa is a word with a more specific, narrower meaning than main office:

main office: (usually plural) the office that serves as the administrative center of an enterprise
mukataa: an Arabic word for headquarters or administrative center

main office (noun)	mukataa (noun)
(usually plural) the office that serves as the administrative center of an enterprise	an Arabic word for headquarters or administrative center