Counter-active is a term used to describe something that works against or opposes a particular action or process. When searching for antonyms for this word, the opposite meaning would be something that is supportive of the action or process. Synonyms such as enabling, catalyzing, and promoting all suggest that the term counter-active is being overturned, and something more beneficial takes its place. These words describe actions or processes that lead to positive outcomes and encourage favorable conditions. Ultimately, finding the right antonym for counter-active depends on the specific context in which it is used and the desired outcome that is desired.