Outgunned is a term used to describe a situation where one person or group has less power or resources than their opponent. Some synonyms for outgunned include overmatched, overwhelmed, overpowered, conquered, and defeated. Other synonyms include outmatched, bested, surpassed, vanquished, and overruled. Similarly, outclassed, outrun, outsmarted, and overborne could be used to describe a situation where one person or team is unable to match up to their opponent's abilities or skills. Overall, these synonyms reflect the idea of being overpowered or having inadequate resources, which can lead to defeat or loss.