Contestingly is an adverb used to describe an action or behavior that is done in a challenging or confrontational way. Some synonyms for contestingly include defiantly, challengingly, competitively, combatively, aggressively, and confrontationally. These words suggest a sense of opposition and desire to win, whether it be in a physical contest or a verbal argument. Other synonyms that convey a similar meaning include up for a fight, oppositional, antagonistic, and confrontational. When used in a sentence, these words can help to convey the speaker's attitude and intent, adding depth and nuance to the message they are trying to convey.