The word "counter-actives" refers to actions taken to neutralize or oppose other actions. Antonyms for this word would be terms that describe actions that are complementary or supportive in nature. Some possible antonyms for "counter-actives" might include "cooperatives," "complements," "enhancers," "reinforcers," or "collaborators." These words suggest a strategy of working with other individuals or forces to achieve a common goal, rather than working against them. For example, a group of individuals might use cooperative efforts and constructive communication to address a problem rather than engaging in counter-actives that could create further conflict.