Base of operations and Main office

Base of operations noun - Installation from which a military force initiates operations.

Main office and base of operations are semantically related in headquarters topic. In some cases you can use "Main office" instead a noun phrase "Base of operations", when it comes to topics like center of operations.

Main office noun - (usually plural) the office that serves as the administrative center of an enterprise.

Base of operations and main office are semantically related in headquarters topic. You can use "Base of operations" instead a noun phrase "Main office", if it concerns topics such as center of operations.