The antonyms for the phrase "catching fire" are numerous and varied, ranging from words related to extinguishing and dampening flames to those related to prevention and containment. Some examples of antonyms include extinguishing fire, putting out fire, quenching fire, dousing fire, and smothering fire. Other antonyms include preventing fire, containing fire, controlling fire, and suppressing fire. These words are all used to describe actions that are meant to stop a fire from spreading, to keep it contained or under control, or to prevent it from starting in the first place. Overall, the antonyms for "catching fire" are words that describe actions taken to mitigate the damage caused by fire.