The word "mercenarily" means to be motivated by money or financial gain, without regard to morals or ethics. There are several synonyms for this term, including greedily, avariciously, selfishly, and rapaciously. All of these words describe a person who is solely focused on material wealth and is willing to act in questionable ways to obtain it. In contrast, some antonyms include philanthropically, selflessly, generously, and benevolently, which describe individuals who are more concerned with giving and helping others rather than solely pursuing personal gain. It is important to be aware of these synonyms and antonyms in order to accurately convey one's intentions and motivations.