What is another word for headquarter?
Pronunciation: [hɛdkwˈɔːtə] (IPA) 
There are many synonyms for the word "headquarter." Some of these include "main office," "central office," "main headquarters," "central headquarters," "head office," "flagship office," and "corporate headquarters." These terms all refer to the main location of a business or organization, where the majority of the administrative work is carried out. Depending on the size and structure of the organization, there may be multiple locations that serve as "headquarters," but these terms all refer to the primary location where the top decision-makers and executives are located. Regardless of which term is used, it refers to the heart of an organization.
