What are the opposite words for subsidiary?

The word "subsidiary" refers to something that is subordinate, secondary or supportive to a main entity. Its antonyms, therefore, would be words that connote independence or superiority, such as primary, superior, main, principal, or dominant. For example, a primary business is one that acts as the main source of revenue, while a subsidiary one would be a secondary or supportive unit. Similarly, a superior company has a dominant position in the marketplace, whereas a subsidiary company is secondary. Understanding antonyms of words like "subsidiary" is crucial for effective communication and clarity, especially in business settings where precision of language is essential for making informed decisions.