Oligopolize is a term that refers to the act of a few large companies controlling a particular market or industry. There are a number of synonyms for oligopolize that can be used to describe this phenomenon, such as monopolize, control, dominate, corner, and secure. These words all imply a level of market power and control, with a few large players able to dictate prices and market trends. Other related words that can be used in this context include hegemony, influence, domination, and authority. Ultimately, whether one is talking about oligopolizing, monopolizing, or dominating a particular market, the end result is the same: few players with a lot of power and control.